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Lactams. VI. Synthesis and Nuclear Magnetic Resonance Study of 1-Aralkyl-3-methyl- and -5-methyl-2(1H)-pyridones

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Lactams. VI. Synthesis and Nuclear Magnetic Resonance Study of 1‑Aralkyl‑3‑methyl‑ and

‑5‑methyl‑2(1H)‑pyridones

著者 Fujii Tozo, Yoshifuji Shigeyuki, Yoshida

Kiyoshi, Ohba Masashi, Ikegami Shiro, Kirisawa Makoto

journal or

publication title

Chemical & pharmaceutical bulletin 23(5),993‑1002

volume 23

number 5

page range 993‑1002

year 1975‑05‑25

URL http://hdl.handle.net/2297/7629

(2)

No.5 993

i〔鯛・騨職鍋〕 UDC547.823.057.03:543.422.25

Lactams.Ⅵ、ユ)SynthesisandNuclearMagneticResonanceStudyof

l-Aralkyl-3-Inethyl-and-5-metllyl-2(1H)‐pyridones

TozoFuJI1,2のSHIGEYuKIYosHIFuJI,KIYosHIYosHIDA,MAsAsHIOHBA,2)

SHIRoIKEGAMI,20)andMAKoToKIRIsAwA2c)

FaC"〃q/P〃αγ”ace"2伽ZScj8"CBS,Kα"αzamaU"jz'”si妙,2)ZVaZjo"αJ1"sj伽jBq/

RacijoZogjcaZScjB"CBS,20)α"‘Pノbαγ"ace"ノノcaZI"sj伽j8,COノルgBq/Sc伽ceawZ E昭Z"“γi咽,M〃o〃U)zjuBγsj秒2.)

(ReceivedSeptember7,1974)

Thealkalineferricyanideoxidationofthequaternarypyridiniumsalts(Ia-g)

furnishedpairsoftheisomeric2-pyridones(IIa-g)and6-pyridones(ma-g)ingoodtotal yields・Inallcases,theoxidationatthe2-positionwasmuchfavoredoverthatatthe 6-position・TheeffectofthearylgroupintheN-aralkylchainontheorientationofthe oxidationseemedtobenegligiblysmallregardlessofthenumberofthemethylenegroups separatingthearylgroupfromthenitrogen・Theextentofthe6-oxidationwasslightly increasedasthealkylgroupatthe3-positionwaschangedfromthemethyltotheethyl

group・

Thenuclearmagneticresonancespectraofthesepyridonesweremeasuredindeuterio- chloroform,carbontetrachloride,andbenzene-`6.Onthebasisoftheresultssummarized inTableslll-VI,theeffectsofthearylgroupandthenumberofthemethylenegroups intheN-substituentonthechemicalshiftsforthepyridone-ringandneighboringgroup protonsarediscussed.

lnthecourseofourrecentstudyonthesynthesisofthebenzo[α]quinolizidinesystem frompiperidinederivatives,1,3)afewpairsofisomeric3-and5-alkyl-1-(2-arylethyl)-2(1H)‐

pyridones(typesllcandlllc)(Chartl)werepreparedbythealkalineferricyanideoxidation ofthecorrespondingquatern虹ypyridiniumsalts(typelc)andtheirstructureswereunequi‐

vocallyestablishedonthebasisofspectraldata、1)Inthenuclearmagneticresonance(NMR)

spectraofthe3-alkyl-2-pyridonederivatives(IIc,g)inCDC13,theHoCsignalofthepyridone rmgwasfoundtoresonateathigherfieldthandoestheHγsignalbyca、0.3ppm,parallelmg theexpenenceofKirisawaandKawazoe4,5)withthespectrumof3-ethyl-1-methyl-2(1H)-

pyridone(IIf)inCS2、Ontheotherhand,theHo`signalofl,3-dimethyl-2(1H)-pylidone (IIa)hasbeenreportedtoappeardownfieldfromtheHγsignalbyO、10-0ユ3ppminCDC13.6)

Incontrast,ElvidgeandJackman6a)havereportedthattheHocandtheHγsignalsofl,5- dimethyl-2(1H)‐pyridone(IIIa)occurat289and2、80Tinthesamesolvent、Thisorderof shifts,however,isoppositetothatreportedbyM6hrleandWeber,66)Althoughithasbeen

knownthatthechemicalshiftsofthea-andγ-protonsofcertainpyridonederivativesare

influencedbythenatureofsolventandconcentratiOn,7)thesetwowouldnotbetheonly

1)PaperVinthisseries,TFujii,S・Yoshifuji,K・Michishita,M、Mitsukuchi,andKYoshida,C〃β”.

P〃αγ”.B"".(Tokyo),21,2695(1973).

2)Location:Z3-ZTaル”α‐加αc〃j,Kα"Q2α"α920,J〃α";α)Addresscorrespondencetothisauthor atKanazawaUniversity;6)9-ZAwugamz-4-c"o”B,Cbj6α280,J”α";c)Z-8Kα"cZz-szzγz`gacZai,

C〃jyo“‐ん",T○んγ0101,J”α"、

3)z)T・FujiiandS・Yoshifuji,C〃β岬.Pハ”腕.B"".(Tokyo),20,1451(1972);6)T・Fujii,M・NChara,Ⅲ.c Mitsukuchi,M、Ohba,K、Shikata,S,Yoshifuji,andS・Ikegami,肋j62.,23,144(1975).

4)M,KirisawaandY・Kawazoe,privatecommunicationtoDr.H・Tomisawa,TohokuCollegeofPharmacy、

Fordetails,seereference5citedinRef、5.

5)H・TomisawaandH・Hongo,A"".Rβカメ.To〃OA〃CO".P〃””.(Sendai),10,39(1963L

6)α)J、A・E1vidgeandLM・Jackman,』.C〃e”・SOC.,1961,859;b)HM6hrleandH、Weber,C〃β籾.Bβγ・’

104,1478(1971).

7)P.W・vonOstwaldenandJD、Roberts,』.O沼.C〃β”.,36,3792(1971).

(3)

&

Vol,23(19715)

994

factors正sponsiblefoエtheconsiderablylargeupfieldshiftoftheHasignalsofthel-(2-aryletllyl)

derivatives(IIc,g).

Inthepresentwork,Wehavesynthesizedseveralpairsofisomericl-虹alkyl-3-methyl-

鯛;鰯:鯛:鵬ll1Iに鰯鯨蝋J鴎繍li:'窒磯i脇蝉

groupincludedintheN-substituentonthelinepositions(でvalues)forprotonsattacUled

directlytothepyridonermgandforthoseofthe3-and5methylgroups・Intheoxidalion

ofthequaternarypyridiniumsalts,theeffectoftheN-substituentontheorientationoflthe

oxidationhasalsobeenstudied

Experimental

Anmeltingpointsarecorrected;boilingpoints,unconFected・Spectrareportedhereinweremeadured withaHitachiModel323UVspectrophotometer,aJASCO-mA-21Rspectrophotometer,aJEOL-JMS-

1,』iA-IUOoraUEC 」S-1IlIDN1BbBctToRfF

ⅡⅡ.、⑤、LL【」二Ⅱ

土ⅡⅡl巳L皿1h勺ⅡaU[ 】皿【】、VIIl2IDI】Ⅱ巳Ⅱa・正I【】Ⅱ エロ ̄【Ⅱ【皿Ⅱ【DlE

1-【」==UOUDleE-OエーqOIIDlerSQq-IIl==qOUDLer-OエーェUUlr1D1erS-rn==rnlIltlnlet-。==の Lu1,=【L【

DrelementalanalvsesandNM」iandmasssDectraI化

=JUreszmTnTDUeSr lIIIlELI】【】、 Ⅱ[

田口【 JUL劃.UTI巳UaCCOェUlllH正0rueDrOCeCUrereDOrTe【ⅡDreVIC

OthercomDonndswereDreDaredasdescribedbelc

、Ⅱ ロロロロロ■ロ■ 睦Uhl巴ⅡI.【DID【:田【 2Llrllr】【】Ⅱ巴【

J、1mole)andmetnvliodide(28.42r-O-2mole1ilif

Ⅱ【 」几U【】IⅡ、-lBIIl」Ⅱ】I【11

。eTlZPne【41」 au乱uエuU皿LECumDeエaEUreエorひ、 ~naIeVeuOVVエSIlDreClD1厄areSrnarreSUl工e①

edoifa.nrldisso1vedinH"0(20ml)_The且dlleoY1RgolutionwaswaRhedwitll 」【】Ⅱ皿

38%).出

」上田皿巫EIIⅡⅡ【Ⅱ。V ̄【】ⅡL巴【lZTZ〃⑰rDL【】IIRh民T【 】T【『、■喝【 】Ⅱ

ゴhtlvvellow1snD1ates・znD9Il nrDn92U2w

DlLIl■【】ⅡⅡ【ⅡT【】IInHTV制.【:_【】r】Ⅱ】T【、【ⅡU】【:偶【

nD97-98U:wU)InD98-99g3c

、nm便thOxvbenzTml-3-methvlnvridnniumChloridE 」lULLI【】血⑰-Ⅱ巳LVl】【IIIIF

、les)alTd3.4-.1ェnetnoxvbenzv1cnlorideユu)(9-33口.501nlnoles)indrvbe元 ILl

edatroonltelnDeratureior4Bb DIIneDlCOl111eallqpellZeエleVVaSrenユOVeQDVeVaDOrar10刀

【lnnH皿llnIlE【ⅡⅡ】Ⅱ 弓Ⅲ J1BLIlⅡl【】」ⅡI【lBrヨ.

DlorlessDriRTns、mD202-204u(decomE

O2NCl:N,5.01.Found:N,5.14.

1-[3-(3,4-Dimethoxyphenyl)propyU-3-methylpyridiniumBromide(1.:X=Br)-

of3-methylpyridine(10.29,0.11mole)and3-(3,4-dimethoxyphenyl)propylbromideエ indrybenzene(100ml)washeatedatrenuxfor24hr、Theoilysaltthatformedwas (150ml).Theaqueoussolutionwaswashedwiththree50-mlportionsofbenzene drynessz〃uac"otofurnishcrudeld(X=Br)(31.29,89%)asayellowishthickoil,wh

……uti。。

X=Br)-A

JEr-O-101nolE

二KⅡLu

inthenextoxidationreactionwithoutfurtherpurification、

4-(3,4-Dimethoxyphenyl)-1-butanoL--Toastirredandcooled(-10.t。-5。)suSpensionofpowdered LiA1H4(3.429,90mmoles)indryether(150ml)wasaddeddropwiseasolutionofethyl4-(3,4二dimet11oxy- phenyl)butyrateエ2)(15.19,60mmoles)indryether(50ml)。veraperiodoflhr・Afterhavingbeensdirred

…。mtemper…f・r25hr,thomi…was…dund…nuxwitM…gfor4hrandwork4d叩

intheusualmannertoproducethedesiredalcohol(11.69,92%)asacolorlessoil,bpl42-146。(1mmHg)

ロit川pl55-157。(…Hg)];エ聰授cm-Ⅷ00(b,。H),2850(CH‘O),1060(。H),1030(Ar。↓H圏);

MassSpectrum”ん:210(Ⅲ+).

4-(4-Bromobutyl)-1,2-dimethoxybenzene-Toastirredandice-cooledsolutionofth (10.59,50mmoles)indrybenzene(20ml)wasaddeddropwiseasolutionofPBr3(15.99,

benzene(20ml)overaperiodoflhr・Themixturewasstirredatroomtemperaturef

IlIIl【】1.:NII

vm…,

'"|so。,

8)

9)

α)H、M6hrleandH・Weber,Te#γα"β`γo",26,2953(1970);6)R、A・AbramovitchandA.R・Vil J・CMリc・SOC.(B),1971,131..

α)E、A・CoulsonandJ、1.Jones,J・SOC.Cハe”.1M.,65,169(1946);6)A、PPhmips,J・山"・Che"

74,3296(1952).

T・Fujii,Y・Ueno,andM・Mitsukuchi,C〃B”.P〃αγ”.B"".(Tokyo),19,1374(1971).

G、H、Douglas,C、R、Walk,and11.Smith,J、JIC`・CMツ2.,9,27(1966).

EC・HorningandJ・KOC,』.』腕.Che腕.SOC.,73,5828(1951).

R・HeckandS・Winstein,J、aw.Cハ`柳.SOC.,79,3114(1957).

10)

11) 12)

13)

(4)

IF矛蒜91

No.5 995

pouredintoice-water(20ml).Thebenzenelayerwasseparatedandtheaqueouslayerwasextractedwith two50ml-Portionsofbenzene・Thebenzenesolutionswerecombined,driedoveranhyd・Na2SO4,andevap- oratedtodrynessj〃uac"0.Theresiduewasdistmedtogivethedesiredbromide(7.119,52%)asacolor- lessoil,bp137。(1mmHg);IR'鯉cm-1:2850,1030(ArOCH3);NMR(10%inCDC13W:7.9-8.9(4H,m,

tWoCH2's),7.39(2H,t,J=6.5Hz,ArCH2),6.56(2H,t,J=6.5Hz,BrCH2),6.10and6.07(6H,seach,two CH30's),3.0-3.5(3H,m,aromaticprotons).

1-[4-(3,4-Dimethoxyphenyl)butym-3-methylpyridiniumBromide(Ie:X=Br)-Preparedfrom3-methyl- pyridineand4-(4-bromobutyl)-1,2-dimethoxybenzene,obtainedasabove,inamannersimilartothatde- scribedaboveforld(X=Br).Theresultingoilysaltwasdirectlyusedinthenextoxidationstepwithout furtherpurifcation、

3-Ethyl-1-methylpyridiniumlodide(If:X=I)-3-Ethylpyridineandmethyliodidewereallowedto reactasdescribedaboveforla(X-I),givinglf(X=I)in99%yield、Itcrystallizedfromacetoneinpale yellowish,hygroscopic14)p1ates,mp80-82o・

FerricyanideOxidationofthePyridiniumSalts(1)-Theoxidationofthequaternarysalts(Ia,b,d,

e,f)wascarriedoutaccordingtothepreviouslyreportedstandardprocedure、1)Isolationoftheisomeric pyridones(、and、)anddetermmationoftheisomerratioswerealsoperformedinthesamemanner、

InthecasesoftheN-methylderivatives,theisomerratioswereobtainedbygas-liquidchromatography (GLC)ofthecrudeproducts・TheGLCanalyseswereperformedisothermallyatl60owithheliumascarrier gasonaShimadzuGC-4BPTgaschromatographequippedwitha1.5m×3mmcolumncontainmg5%

dietllyleneglycolsuccinateonShimaliteWTherelativeretentiontimeofthe3-alkylderivatives(IIa,f)

tothecorreSponding5-alkylderivatives(IIIa,f)was0.42-0.47.

TheresultsoftheseexperimentsaresummarizedinTablel,andthephysicalpropertiesofthepyridones aredescribedinthefonowin9.

1,3-Dimethyl-2(、)-pyridone(IIa)-Obtainedasayellowishoil,bp96-97。(3mmHg)[lit・bp86-88。

(1.45mmHg);エ5)bp78。(0.5mmHg)6。)];spectra(Tablesll,111,andlV).

1,5-Dimethyl-2(1H)-pyridone(IIIa)-Alightbrownishoil,bp83-84。(1.5mmHg)[lit.`。)bp98.

(3.5mmHg)],crystanizedinahygroscopicsolid")onstanding;spectra(Tablesll,、,andlV).

1-(3,4-Dimethoxybenzyl)-3-methyl-2(1H)-pyridone(IIb)-RecrystaUizedfmmetller-pet・ether(bp 26-50。)(3:1,V/v)tocolorlessscales,mp59-61。;MassSpectrum〃,仁:259(M+);otherspectra(Tables ll,111,andlV).』M、Calcd・forCェ`Hェ703N:C,69.48;H,6.61;N,5.40.Found:C,69.34;H,6.60;N,

5.32.

1-(3,4-Dimethoxybenzyl)-5-methyl-2(1H)-pyridone(IIIb)-Recrystanizedfromhexane-ethylacetate (2:1,v/v)toslightlyyellowishpriSms,mp107-108。;MassSpectrum”仁:259(Ⅲ+);otherspectra(Tables ll,、,andlV).

1-[3-(3,4-Dimethoxyphenyl)propyl]-3-methyl-2(1H)-pyridone(11.)-Crystanizedfromhexane-ether (1:1.V/v)incolorlessneedles,mp62-63。;MassSpectrumw化:287(M+);otherspectra(Tablesll,111,and lV).awuJ、Calcd、forC17H21O3N:C,71.06;n,7.37;N,4.87.FoUnd:C,70.98;H,7.11;N’4.82.

1-[3-(3,4-DimethOxyphenyl)propyl]-5-methyl-2(lZI)-pyridone(、。)-Apaleyenowishthickoil,Mass Spectrum郷/β:287(M+);otherspectra(Tablesll,、,andlV).

1-[4-(3,4-Dimethoxyphenyl)butyl]-3-methyl-2(1H)-pyridone(me)-Obtainedasapaleyellowish,

thickoil,MassSpectrum”仁:301(M+);otherspectra(Tablesll,、,andlV).

1-[4-(3,4-Dimethoxyphenyl)butyl]-5-methyl-2(1H)-pyridone(me)-Apaleyellowishthick,oil,Mass Spectrum”/β:301(M+);otherSpectra(TablesII,、,andlV).

3-Ethyl-1-methyl-2(1H)‐pyridone(、)-Acolorlessoil,bp72-73。(1.5mmHg)ロit、16。)bp122-123。

(11mmHg)];spectra(Tablesll,111,andⅣ).

5-Ethyl-Lmethyl-2(1H)-pyridone(IIIf)-Obtainedasacolorlessoil,bp87-89。(1.5mmHg)[lit・エ66)

bp120-123。(6mmHg)];spectra(Tablesll,111,andⅣ).

IEI

!}

iii

liii■;

讓匿

ResuIts

Thealkalineferricyanideoxidationofthequaternarypyridiniumsalts(Ia-g),prepared byquaternizationof3-methyl-or3-ethylpyridinjewithmethyliodideoradeqUatearalkyl halidesinbenzenesolutionasdelineatedinChartl,waseffectedinthesamemanneras

describedpreviouslyユ)anditfurnishedtheresultsshowninTableLItmaybeseenthatin

allcasestheoxidationofthesaltatthe2-positionismuchfavoredoverthatatthe6-position.

:Ii

111 Ⅲ焔岨

C、Stoehr,J・Pγαハノ.die腕.[2],45,20(1892).

HL・BradlowandC.A・Vanderwerf,J、0,9.C〃`”.,16,73(1951).

α)S・SugasawaandM・Kirisawa,Che腕.P〃α'[email protected]".(Tokyo),4,139(1956);

(1955).

Ⅱ#

6)nZe加,伽`.,3,190

iiiIFL

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996 VOL23(19本)

Ⅱa-g

勲息

肌冠ツ 。

。)〔iirm‘

存(昨弐:)○)

ma-g

.咄 a勺、c司uePTLp(’ ●●●●●●●●●●●●●● HHHHHⅣⅣ ’’’’’’’一一一一一一一 〔L)(L)〔’)(‐)(’)(’)(’) 田、班斑凪沮沮 ●9●●夕●●ロ●●夕●●夕丘URu ●●←●ログ 望否一m

2842r 、幻、幻、幻、幻、佃佃側皿佃CAhhCA 一一一一一一一一一一2222z RRRRR 戴脳篭灘篭鐘駕…蕊

TABLE1.TheFerricyanideOxidationof3-SubstitutedPyridiniumSalts

Productb)

--- ̄

Combined%2-Oxidation%6-Oxidation yield(%)(II).(Ⅲ)

Substituentcu)

--

Rユ R2

Pyridiniumsalt

;蕊

93(IIa)c)7(IIIa)`)

90(IIa)。'の10(IIIa)。'α)

96.6(IIa)`'.)3.4(、a).'。)

92(IIb)8(nlb)

94(IIc)')6(IIIC)')

92(IId)8(IIId)

91(IIe)9(me)

87(、)。)13(IIIf)`)

(IIf):(IIIf)=8:1jz)

88(119)')12(Ing)/)

3 ̄△▲3 。△

70α)

53.1の 68 76')

509)

501)

86 76 ̄84")

71')

則助助助口側団一一一一一一一一一一一一一一xxxxxxx くlく!IくibCdeffg IIIIIII 斑込恥凪伍〔し(し(し(し(し

ArCH2 Ar(CH2h Ar(CH2h Ar(CHj4 CH3

今遭

C2H5Ar(CH2L

唾卍・・

鱸蕊慰蕊蛾蕊霧

轄涜・麹鐡

L)nSIneTarIC

坐il

(6)

,lIllllllllllIl

1ケ、

No.5 997

TABLEILU1travioletandlnfraredSpectraofPyridones UVspectrumcD)

IRspectrumb

〃CO(cm-エ)

CompOundShort-wavelength

band

/-----ヘ

スmax(nm)109s

Medium-wavelength band 一一ヘーーヘ

lmax(nm)109℃

Long-wavelength

band --

スmaユE(nnl)109s

2-Pyridones

Ⅱa

Ⅱb

Ⅱcc)

Ⅱ.

232 231 231 230

3.80 3.81 3.83 3.80

1653 1653 1651 1652 3.72

4.11 4.12 4.11

0020 0000 3333

286 286 282の 286 282の 286

342435 888888 ●●●●●● 333333

Ⅱe 2304.12 300 3.81 1651

Ⅱf

Ⅱgの 6-Pyridones

Ⅲa

Ⅲb

Ⅲcc)

Ⅲ.

1652 1650 232

232

3.74 4.08

300 303

3.82 3.81 2863.81

|・か玉Pいr・牝川ぽ爬憩mL鍔評弥腔咄堤揮・・・f■皿〉‐設・vい、叩印守叩も■・已壯・》・札・芋JⅡI■・1■Ⅱ▼ず。」

1673 1670 1667 1670 3.73

3.71 3.74 3.69 232

231 231 230

3.89 4.21 4.17 4.16

312 315 314 314

542616 888888 222222

3.63 3.66 3.65 3.65 3.67 3.67

1670

Ⅲe 2304.18 313 3.71

1669 1668

Ⅲf mgc)

3.73 3.76 3.92

4.19

311 313 232

232 2843.68

皿哩suTedinabs・ethanoL

DeteTmiTledinchloroformsolutionat0.2MConcentration、

Fromref、1.

Shn111der=

α6Ca

InCDC13solutionthepyridone-ringprotonsofIIadisp1ayedthespectrumofanA2X-type andadecreaseinconcentrationfrom0.4Mto0.2MortoO、lMdidnotalterthespectrum,

Theaccidentalequivalenceoftheoc-andγ‐protons,confimnedbyspin-decouplingexperiments,

wasnotpreservedwhenthesolventwaschangedfromCDCl3toCCl4orbenzene-uZ6・The resultsarealsoincludedinTablelV・Theoc-andγ‐protonsoflIbandllfalsobehavedsimi- larly・Intheothercasesincludingthoseofthe6-pyridones(ⅡI),thepyridone-rmgprotons

approximatetoABXsystems・However,differenceinchemicalshiftbetweenstrongly coupledprotonswassufIicientlylargetoallowafirst-orderanalysis・Itshouldbenotedthat thecmterionusedfordistinguishingbetweentheHocandHγsignalsofthe2-pyridonederiva- tiveswasthemultiplicityofthelatterduetolong-rangecouplingbetweenHγandthemethyl ormethyleneprotonsatthe3-position、Forexample,spin-decoup1ingexperimentswithlIc mCCl4revealedthatJHr,cH3iscz、1Hzand八画,cH3,Ca、0.7Hz・Additionalevidenceforthe identihcationoftheHγsignalwasan18%nuclearOverhausereffectObservedbetweenHγ

and3-methylprotons・Similarly,saturationofthemethyleneprotonsofthe3-ethylgroupm llggavean11%nuclearOvenlausereffectforHγ,demonstratingtheproximityofHγand themethylenegroup

ltmaybeseenfromTablelVthatinCDCl3solutionsall2-pyridoneseXhibitedtheir Hγsignalsintherange279-282T;Hβsignals,intherange3、89-3.93でwiththeexception ofthatofllc;Hocsignals,intherange2、80-2.88Twiththeexceptionofthatofllc・The 6-pyridonesdisplayedHγsignalsinthesamesolventinthe2、76-2.81Tregion;Hβsignals,

inthe3.43-3.49了region;Hocsignals,inthe2.93-2.98でregionwiththeexceptionofthat

ofIIIC;3-methylsignals,inthe7.93 ̄7.96丁regionwiththeexceptionofthatofIIIC・The

11‐し11口I

ii

頚:鶴_:、麓

i豐鑿塁エ

(7)

J9Id ljl

・・・I

TABLEIII、ChemicalShiftsforProtonsOtherthanThose AttachedtoPyridoneRing

Chemicalshift(て)α) 片lfUI pU・

Concen- Kj tration

(M)

Com-

pound

Sol-

vent Methylprotons Methyleneprotons

---- Aromatic

protons

_’

CCH3NCH30CH3CH3CH2CCH2CArCH2NCH2ArCH2N

‐弓

2-Pyridones

7.85 7.95 (s)

7.85 (s)

7.82 (s)

7.81 (s)

7.92 (s)

7.79 (s)

7.84 (s)

7.85 (s)

8.82 (s)

(t)b)

8.87

(t)b)

8.84

(t)b)

8.84

(t)b)

6.46 6.54 (s)

7.03 (s)

(s)

Ⅱa CDq3 0.4 CC14 442

000

C6D6

4.91

(s)

3333333く3333

Ⅱb CDC13 6.13(s) jj』

5.85 6.01 (t)

6.12 (t)

6.01 (t)

6.04 (t)

(t)

6.16(s)

6.12(s)

::誤(:)

6.98

-(t)

7.12

-(t)

7.11

-(t)

7.72-7.32

8.10(、)(t)

8.02-7.39

8.62(、)(t)

平鍋土牢、牛釧hy肥

Ⅱc CDC13 0.2 CCl4 0.2

0.2 6.57(s)

C6D6

::雛)-

閉(:)-7.41

 ̄(q)、)

7.53

-(q)、)

7.34

-(q)、)

::墨(:川;,)

Ⅱ. CDCI3 0.2

30(、)

lITHn)

Ⅱe CDCl3 0.33

5J370J As5SDs 6く6く7く

Ⅱf CDCl8 0.4 CC14 0.4

C6D6 0.4 7.11 鞭l「l羅一蝋一》一一三一伽 llIi11jj川七ⅡfⅡ。□□Ⅱ〃タマ

(t) 6.00 (t)

Ⅱ9 CCl4 0.2 6-Pyridones 71,8く7く8く8く 川幻獅印加幻Ⅲ幻刷印

6.48 7.02 (s)

(s)

Ⅲa CDCl3 0.4 C6D6 0.4

4.94 6.13(s) (s)

::霊(:)

瓢:)

mb CDCl3 0.2

5.89 6.14 (t)

(t)

7.00 7.11 (t)

(t)

Ⅲc CDCI3 0.2 C8D6 0.2

[】【【】【【-】【【】

0000

メスJD H】8日]

D6 6E

『‐】’】ILP【皿罵『]

「1 L」

DC

I) 、@

『J〃■Ⅱ、【【u

四勺二

。P民ⅡZnⅡILPIWHH-院hlul上

■-- ̄

(8)

蕊蕊 1口IllIlIl‐

No.5 999

TABLEIV Pyridone-RingProtonResonances

Concen tration

(M)

Chemicalshift(T)の Couplingconstant(Hz) ----

ハβJα7Jβ7

CompoundSolvent -- ̄ ̄

Ha Hβ H7

2-Pyridones CDC13

CC14 CGD6

ⅡbCDC18

Ⅱc CDC13 CC14 C6D6 mCDC13

Ⅱe CDC13

ⅡfCDC13 CC14 C6D6

Ⅱg CC14 6-Pyridones

Ⅲa CDC13 C6D8 mbCDC13

mc CDC13 CGD6 mdCDC13

me CDC13

ⅢfCDC13 C6D6

2.82(d-d)、)

2.86(d-d)b)

3.71(d-d)b)

2.80(d-d)、)

3.12(d-d)b)

3.20(d-d)、)

3.73(d-d)、)

2.88(d-d)b)

2.87(d-d)、)

2.82(d-d)、)

2.87(d-d)、)

3.67(d-d)、)

3.18(d-d)、)

4442222234442 ●●●●●●●●●●●●■ 0000000000000

3.93(t)

4.11(t)

4.51(t)

3.92(t)

4.02(t)

4.23(t)

4.57(t)

3.91(t)

3.92(t)

3.89(t)

4.08(t)

4.44(t)

4.19(t)

DD JJ

1ノ、ノ、ノ、ノ、ノ、ノ、ノ、ノ、ノ、ノ、ノ、ノ、ノmmmmmmmmmmmmm l一一一一一一一一一一一一勺。。。。。。。。。勺□。。勺。勺0勺。。。●dQdrl7l7lrl7lrNrl7lrkfkrkrkrし駆肌Ⅲ別刀妬町内別印朋閉的●●●●●●●●●●●●● 9】9】へ。o】9】o】(。ワ】o】?】o](do】 6670776887778 ●●●●●●●●●●●●● 6667666666666 6670776887778

●q●●●●●●●●●●● 6667666666666

2.0 2.0

00000 ’22222 一MMM

80(d-d)

39(d-d)

81(d-d)

78(d-d)

3剤.55.)

80(d-d)

80(d-d)

76(d-d)

33(d-d)

α 地巾叩制巾血肋地巾q〉R)q〉勺上(50》q〉q)7

49(d)2 54(d)3 43(d)2 43(d)2 3-3.55の3 47(d)2 47(。)2 47(d)2 51(d)3

442222344 ●●●●●●●●● 000000000 232333223 333333333

...c)

...c)

0.8 ..°C)

..、の ...c)

...c)

...c)

..、の

54555555 ●●●●●●●●● 2222卯2222 4221 ●●●● 9999

9.7 9.5 9.1 9.1

TheletterinParenthesesdesignatesthemultiplicityorshapeofthesignalwiththeabbreviationsappeared atthetopofExperimentalpmt、

Obseェvedasadoubletofdundoublets・

UnmeasurablysmalL

Overlappedwiththesignalsoftheaエylprotons.

αうりCが』 ’’11111

ofCDCl3andbenzene-`6,mostsignalsshiftedupfieldastheconcentrationofbenzene-uJ6was

lncreased・Amongthepyridone-rlngprotonsandtheneighbolingmethylormethylene

protons,Hocwastheonemostprofoundlyaffectedbythearomaticsolvent、Incontrast,the

3-methylprotonsoflla,candtheHβprotonsofllla,cwerevirtuallyunaffected,Whereas

theotherprotonsweremoderatelyinfluenced

Finally,theeffectoftemperatureonthechemicalshiftsoftheseprotonsisvisualized inTableVI・ItmaybepointedoutthattheHocsignalofllcaloneshiftedupfieldasthetem-

peratul巳becamelower,whnetheotherprotonsshifteddownfield.

Discussion

Theratiooftheisomericl,3-and1,5-dimethyl-2-pyridonesformedbytheferricyamde oxidationofla(X=I),showninTablel,maybecomparedwiththatreportedbyother workers8)forthesamereactionbutunderslightlydifferentconditions・Thefactthatreplace- mentofthemethylgroupattachedtothenitrogenoflabyの-(M-dimethoxyphenyl)an可d group,evenby3,4dimethoxybenzylgroup,doesnotcauseanyappreciablechangeinthe olientationoftheoxidationisprobablyattributedtothealmostequaleffectsofthesteric

bUlkoftheN-substituentonboththe2-andthe6-positions・Theresultsoftheoxidation oflf(X=I)alsocomparefavorablywiththosem・)reportedforIf(X=CH30SO3)andthose1)

forIg(X=Br).Aspointedoutpreviously,1)theslightincreaseinthe6-oxidationobserved

(9)

Vol、23(1975)

1口I

1000

.’

EfIectofAromaticSolventonChemicalShiftsforPyridone-Ring

TABLEV.

印と|’1

M`MWI鐡

InCDC13-C6D6

Molarratio(C6D6/pyridone)

Com-

poundProton

64 16 32

0b)

322-892-943-C ++十++++’一十汁十件十十十一十十十十十 0000000000000000000000 記1組+叩Ⅱl皿1年組”「肥‐卵叱由土叩刷閉師川卜牢腓〃Ⅲ「印I

4.51 a31 7.03 7.85

482000 ’’’’’’’’’65298β 333683 4349卜㈹81630695772078241998450714 4367334257333683

4.12 2.96 6.63 7.88

07065518200537トM508581088805859134 ●●●●●●●●●●●●●●●●● 42673425733267333 73668730291982ト卵509581089805850234 ●●●●●●●●●●●●●●●●● 42673425733268333

3.93 2.82 6.46 7.85 3.12 4.02 2.79 5.85 7.81 2.93 3.49 2.80 6.48 7.93 3.15--

3.28c)

3643 3.98 2.85 6.48 7.85 3.14 4.03 2.79 5.87 7.81 2.96 3.50 2.82 6.50 7.95 3.17~-

3.32c)

3.45 Hβ

Hr NCH3 CCH8 Ha Hβ H7 NCH2 CCH3 Ha Hβ Hr NCH3 CCH3 HI

3.73 3.24

Ⅱc

4.57 3.27 6.12 7.79 3.86 3.54 3.39 7.02 8.45 3.85 3.3-

3.55の 3.3-

3.55の 6.14 8.51 4.13

2.89 5.92 7.83 3.22 3.53 2.97 6.65 8.07 3.34-

3.44の 3.47

3.80 3.58 3.32 7.00 8.40

Ⅲa

Ⅲc

3.473.49 Hβ

H7 NCH2 CCH3

3.09 6.08 8.28 2.91

5.98 8.12

2.97 6.02 8.19 2.81

5.92 8.04

2.85 5.96 8.07 2.80

5.91 8.03 2`78 5.89 8.01

目F8nP⑪Ⅱ[oⅡneDvrlponeseコエaエユユエユcc

〕osition,andsplittingpattemofpyridone-ringprotonresonances,werefoundtoberelialP1e

L

ヨL1SO1nIIlePresenIwuI正.

砒柵艦騨旨鰯鵬撫蹴:職!::繍撫菟鯛墓

portedinsequentialpapersinpreparation.

盤!

(10)

鱗!?

。r・■し‐卸粁無

#▼No.5 1001

工ABLEVI、InfluenceofTemperatureonChemicalShiftsforPyridoneとRing

ProtonsandNeighboringMethylorMethylenePrOtonS 111‐

Chemicalshift(で)inCDC13

Temperature(。C) T(-50。)

-丁(23。)

CompoundProton

23 0 -30 -50

ⅡaPU) Ha Hβ H7 NCH3 CCH3 1L H6 H7 NCH2 CCH3 Hd Hβ H7 NCH3 CCH3 Ha Hl8 Hr NCH2 CCH3

2.822.802.77、2.76

‐3.933.923.893.87・

2.822.802.772.76.

6.466.426.416.41 7.857.857.83-7.83 3.123.143.143.14 4.024.013.993.98 2.792.762.752.74 5.855.865.855.85 7.817.807.807.79 2.932.902.882.87 3.493.483.473.47 2.802.782.762.75 6.486.466.466.45 7.937.917.907.89 3.15-3.28c)3.15-3.28c)3.15-3.28c)a15-3.28c)

3.433.423.393.39

‘2.782.752.732.71 5.895.895.895.88

8.018.018.017.99-

666522450262534 0000000000.00000 ●●●●●●●●●●●●●●● 000000000000000 ’一一一一十一一一一一一一一

ⅡCD)

Ⅲaの

#

ⅢCD) 0000 4712

●●●● 0000 ’一一一

α) 6)

c)

皿P空mredonO、4BKsolution・

MeasuredonO、2虹solution・

Overlappedwiththesignalsofthearylprotons.

Probablythemostsalientfeatureofthepresentprotonresonancestudyisthatthe2-

and6-pyridonesofanN-Phenethyltypebehaveinamannerdifferentfromthatoftheother homologs・TheupheldshiftsobservedforHaandHβofllcandforHaandthe3-methyl protonsofIIIcmaybeinterpretedintelmsofcontributionsofconformerslVandVasshown mChart2,whicharefoldedmsuchamannerthattheseprotOnslieabovetheplaneofthe

benzenermg・Theobviousanalogycanbedrawnwiththeresultsofthestudyoftheeffect ofsolventbenzene-`Gonchemicalshiftsforthepyridone-rlngprotonsandtheneigllboIing

methylormethyleneprotons(TableV).Resonancestructuresforl,3-dialkyl-2-and-6-

pyridonesareshowninⅥandVII(Chart2)withthebenzenemginap1aneparalleltothe

CH3

0- CH3

、KiiJ:L瀞。

CH

Chart2

pyridonermg・Ontheanalogyoftheproposedspecificinteractionbetweenthebenzenerlng

andN,N-disubstitutedamides,18)thearomaticringispresumablyattractedbythepartial

positivechargeonthenitrogenofresonancestructuresVIandVII,butrepelledbythenegative Chargeofthecarbonyloxygen、TheproximityofthebenzenenngandHaaswellasthe

18)α)J、V・HattonandR.E・RichardS,MoJ.Pノi,'s・’3,253(1960);6)Z`β”,j6id,5,139(1962).

(11)

vol、23(1975)

1002

巴I且Illll

】【:IallOIll【

gnDonngPro[onsoIv上c

】Tm&【HIII

】T【】T【 】皿⑰l【

】【】U】U副lIDIU【・【DTI 】ID【

二、紐、【

TTU【】UⅡ[]【】Ilq】lC【】111【

】Tan【nlllIDLIl巳IIl上Ll

】eCII【】、【DII、【】le【:UIlH-rIIlUel臼lIlL・Le【

弓工Uupsepと 1J【

ヨTDT】&HThT⑪【】巳rじ゛■IllL rnI【【・【DID【DTIII催Ⅱ円

】T【DLUIlTebn【 副I【

】VⅡ【Ⅲ

)nfhR Le1ongaIlonc 】UII ⑪TTnTBe【】rlnu

、T巴IDBⅡⅡ

11t DII 僧、Tm倍DUII【 上U=曰

)(:LRnf lUl・I ̄LULI1。11.

DIC

】11】U】【】TI【I DTI隅F【 leUlU色TUyZ■H1巳=四

】畦【21紐」皿

)CLRoll]tnonsthe比一Drotonsot2-and6-DvT1dc

DIluユlHl■l【】【的H1【Dulu【】⑰Ⅱ【,.【

〕TOIOS.on昌磑rVe【

】BLDrBInre ロ値q

ミT】【】TI催【

、Tm便T 【DID=I】vrI【Ⅱ

〕vtheB Drkersoj⑫)andoDDositetc =【 TwlnworkerspD

RSbE

】「磑孟1.1【】ロ

】I】e【lLIl劃IlH ユyw11lproveoIgc

Jllel・LE【lC【DTnl】【】UII1r

、I」RIT1Inn.T1【~DnOIUaDan▲aLzエan正一IIl-rLlL 征ⅡHuBⅡⅡⅡⅡⅡⅡⅡⅢ副.u【。HHI】uJu

forCancerResearch(No.801018,toProfessorDMizuno)andaGrant-in-AidforScientiiicResearchl(A‐

劉髄……雛搬………

andProfessorY.Ban,HokkaidoUniversity,fortheirinterestandwarmencouragement.

蕊鍵蕊蕊籔蕊灘灘蕊欝蕊蕊蕊蕊蕊蕊蕊議蕊蕊蕊蕊議蕊蕊蕊蟻蕊蕊蟻蕊》蕊譲窺議識蕊溌蕊懲》》》〉》護祷蕊藤

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