1‑methoxy‑2‑oxindoles
著者 Somei Masanori, Sato Haruhiko, Komura Naoko, Kaneko Chikara
journal or
publication title
Heterocycles
volume 23
number 5
page range 1101‑1106
year 1985‑01‑01
URL http://hdl.handle.net/2297/4303
HETEROCYCLES,Vbl23,No.5,1985
SYNTHETエCSmUDYFOR1-METHOXYエNDOLESAND1-METHOXY-2-OXエNDOLES1
MasanoriSome1,*HaruhikoSato,NaokoKomura,andChikaraKaneko2
FacultyoどPharmaceuticalSciences,KanazawaUniversity,
l3-1Takara-machi,Kanazawa920,.apa、
Abstract.The且rstsynthesesofl-methoxYpimprinine,
9-methoxy-6-carbolinederivatives,and3,3-disubstitutedl-methoxY-
2-oxindolesarereported・ApracticalshortstepsYntheticmethod Eorl-methoxyindole-3-acetonitrileisalsoreported.
ェsolationoEanumberoモユーmethoxYindolederivatives3fromp1antsandmicroorgan-
ismspromptedustosynthesize1-methoxyanalogsofbio10gica11Yactiveindo1e derivatives・エnthisreport,wewishtodescribetheEirstsYnthesesoE1-methoxy-
pimPrinine,9-methoxY-B-carbolinederivativesincluding9-methoxyharman,and3,3-
disubstituted1-methoxy-2-oxindoles・Synthesisofnaturalauxin,41-methoxYindole-
3-acetonitrile,isalsoreported.
エ.PreparatユonoゼエーMethoxvp1mprユ、ユne■
Readi1yavailabエe1-methoxyindo1e(2),preparedfrom2-nitrotoluene(1)in62g ~ ~
yieエd'5wasreactedwithchloroacetylchlorideinreE1uxingbenzenetoaEford82g yieldof3-chloroacetyl-1-methoxyindole6a(3a).Treatmentof3awithaqueous ヂ、へシ 夢、グー
a、エIlonユaユnasealedtubeYie1ded3-(2-amユnoacetY1)-1-methoxYindo1e6b(4)in35gO0 J、〆
yield・Thiscompound(4)vvasfoundtobeunstableandpolymerizeonstanding・
バン
ThereEo]Ee,immediatelyaどterpreparationoE4asdescribedabove,itreacted
~
withoutpuriEicationwithacetylchlorideinmethYlenechlorideandtriethylamine
toproduce3-(N-acetyl-2-amユnoacetY1)-1-methoxyindole6c(5)in44goverallyield・ ハン
SubseQIuenttreatmentof5withpolyphosphateesterinre五luxingch1oroformgave~
,、6.(6a).Thestructureo五6awasconEirmedune-
788yieldoE1-methoxypimprユ、ユne ヘジ、グ ゲソレ
QIuivocallybytheEactthathydrogeno1ysiso全5aover1O愚pal1adiumoncarbongave
へび、ゲ
99:iYieldofpimprinine7(6b),whichwasidenticalwiththesamp1epreparedErom ヘリ臼‐
3-ch1oroacetylindole(3b)accordingtothesamereactionsequencesasdescribed
へヘク
aboveど。]二6a・
ゲミヘグ
-1101-
TreatmentoE1-methoxyindo1e(2)withl-dimethylamino-2-nitroethylene8inaceto- ゲ、〆
nitriエeandtrif1uoroaceticacidproducedl-methoxy-3-(2-nitrovinyl)indoエe6e(7) ~
in768yield・SubseCIuentreductiono造7withsodiumborohydridein2-propanoland
ノミグchloroEorminthepresenceoEsi1icage19afEordedl-methoxy-3-(2-nitroethy1)-
indole6だ(8)in72号yield、Onheating8withhexamethy1phosphoroustriamide1Oand
「し ~triethylamineinl,2-dich1oroethaneat80oC,itwasconvertedto1-methoxyindo1e-
3-acetonitrile6g’11(9),anatura1aux1n ~
、4isolatedEromChinesecabbage,in53g
yieエ。、Thus,apracticaエsyntheticmethod造or9wasestablishedfrom2-nitro-’、グ ヒoユuene(エ)inEourstepswitha17患overallyield.~
エエエ.PreparaヒエonoE9-Methoxy-6-carbo1ineDerivatives
ReductionoE7withlithiumaluminumhydrideinrefluxingethergenerated62g ~
yie1doE1-methoxytrypl二amine6h’’3(10).FormylationoflOwascarriedoutbythe
へ■、 ヂーー reactionwithどormicacidandaceticanhydrideatroomtemperaturetoyieldNb-Eormy1-1-methoxytryptamine6i(1lb)in918yie1d・Whentheamユne(10)reacted ヘジベデー ゲゾ、"
witheitheracetylchlorideorpropionylchlorideinmethylenech1orideandtri-
ethylamine,thecorrespondingNb-acety1-6j(エエc)andNb-prop1onY1-1-methoxytript-
ヘジベリ、ジ.6k(エユa)wereproducedin86患and818yields,respective1y・
alnユne
~~臼ゲ
ConstructionoどB-carbo1inestructurewasexaminedundervariousreactioncondi-
tionsusingエエa,andEinallyfoundthatsynthesisofveryunstab1e3,4-dihydro-1-へヂソミグ
ethy1-9-methoxy-6-carboline61(12a)wasachievedin63号yieldonlYwhen11awasre-P ̄V、ツー ーグ、グー~
actedwithphosphoryエchlorideat110oCfor20min・SubseQ【uentreductionoE12aハグーベジ withsodiumborohydrideinmethanolaffordedl-ethyl-9-methoxy-エ,2,3,4-tetrahydro-
6-carboline6m(13a)in90gyield,whichwasstableincontrasttothecompound PV臼ジヘグ
(12a).SjmiLarly,thecompounds,(1lb)and(11c),wereconvertedtothecorre-
ハデV、グザ 夢V、ザ、‐ へ〆、グー
sponding9-methoxy-1,2,3,4-tetrahYdro-6-carbolines,(13b)6,and(13c),6oin61号へジン、 ̄ 戸一、-,夕
and58$overaエエyieユ。s,respectivelybysuccessivelYconductingoどtheabove mentionedcyclizationandreduction・
OxidatユonoE12awith2,3-dichloro-5,6-dicyano-1,4-benzoquinoneinmethylene ハザ、へP
ch1orideatroomtemperaturea正ordedl-ethy1-9-methoxy-B-carbo1ine6p(14a)andへジン、ハジ
ユーethy1-l3-carboline(15)in4号and1O患yields,respectivelY・Thecompound(14a)グーL~
ヂレ丙バグ■’
wasquiteunstableanddecomposed]ごapidlytol5onstanding・Ontheotherhand,ハゾ、-
oxidationoE13bwithactivemanganesedioxide12(l1moleq.)inreE1uxingbenzene 伊田ヘヘグ
generatedstab1e3,4-dihydro-9-methoxY-6-carboline6QI(ユ2b)in56gyield、Whenanグンヘ〆、‐
excessamounto造manganesedioxide(49moleq.)wasusedinrefuxingbenzene,
-1102-
HETEROCYCLES,Vbl23,No.5,1985
9-methoxy-6-carbo1ine6rU4b)wasobtaユnedasastablecompounddirect1YErom13b ヘニジー ハゴ、リ、’
in50gyie1d・Underthesamereactionconditions,unstableエーmethyl-9-methoxy-β‐
carboline6s(14c),9-methoxyharman,waspreparedinl4号Yielddirectlyfroml3c・ヘリ、- ̄ グー、戸、グ
ェtisinterestingtonotethatthereisasignificantdifferenceinstability amongthesecompounds(14a-c)andstabi1ityorderisl4b>14c>14a・Thisresult
~~~ ̄--- ヂーーーへグー■内げ ̄~-clearlyshowsthatthestabilitydecreasesvvithincreasingstericbulkinessoE1-
substituent・However,itisnotsurprユsユngthat9-methoxY-1-vinyl-6-carboline3b'。
(16)hasbeenisolatedasastablenaturalproductbecauseitsl-substituenthas
ヘリ、ヂ
sp2hyb]ごidizedcarbons・
Cata1YticreductionoE14boverlOgpalエadiumoncarbona五forded86gyieldoE6-
ヘリベグーcarboline,whichvvasidentica1withthesamp1epreparedbytheconventionalmethod
Eromtryptamine、Thus,thestructuresofB-carbolines(l4a-c)wereconfirmed・
へジベニヘーベジ、--2-。xindoleDerivatives エV・Preparationof3,3-DisUbstituted l-methox
Thereactionofmethyl2-nitrophenylacetate(エ7)with1,1-dimethylpropargyエハジー
chlorideinthepresenceoEsodiumhydrideinabsoluteN,N-dimethy1Eormamide
a丘orded56急yie1doEmethyl3-ethynyl-3-methyl-2-(z-nitrophenyl)butYlate6t(18).
へツーPReductiono造18withzincandammoniumchlorideinmethanolandwaterandsubse-
へ-
quentmethy1al二ionoEtheresultant1-hYdroxy-compoundwithethereaエdiazomethane
produced67gyie1d○だ3-(1,1-dimethylpropargyl)-1-methoxY-2-oxindo1e6u(19ル
ヘヘグTreatmentofl9withallylbromideandpotassiumt-butoxideinabsoluteN,N-di-
PL伊
me上hy1formamidegenerated69号yieldo至3-allyl-3-(1,1-dimethylpropargY1)-1-
methoxy-2-oxindole6v(20a).Similarly,3-(1,1-dimethylpropargyl)-1-methoxy-3-(2- グ、'V-
methoxycarbonylethyl)-2-oxindo1e6w(20b)vvasobtainedin83名Yie1dbythereaction ̄、ターグ、夕
oE19withmethylacrylateandsodiumhydrideinabsoluteN,N-dimethylEormamjLde、
P、ゲ エnconcエusion,l-methoxyindolestructurevvasfoundtoto1eratetovarioustypesof reactionconditionsasdescribedabove,thoughdemethoxy1ationwasoモtenobserved inoxidativereactionsandespeciallyundertheirradiationoE1ight・Basedontheseresu1ts,wearecurrent1Ypursu1ngthesyntheticprojectEoroxalines3a'c'e
andl-methoxyanalogsofergotalkaloids.
-1103-
0 0
αI:‘ 一/ mⅧ』 一 こ
-P○
H2
[ 3 ~ R
a:R=OMe b:R=H
句■I⑲ 4 ~ OMe
>M・ I。
夕
○ こ
H --○m
HoMe
lOOMe
ROMeMe
~ 7 ~ 6 ~ 5
e M OH llll RR
●●●● ab
シヘ
ミー
I02 こ
卜「し一一 ○□
H8 OMe
~
’
~、伊 a、【媚】C ●●■●●● RRR r〃〃 ------ EHM 七e ハヴー a、(》〕 ●●●●、 、
RRR y〃Plllll- EHM t e○
I CNor。○ OpC + <コワ○
OMe 50
9 ~ ~、 ̄ 15 へ学一 ab RR l--- ⅡH 七
e M ll y -R
C
/「、
=CO ,,NO2
oMe
-
こ
OMe -○
I --○
OMe 20oMe へシーツ
RIC= ̄CH2CH=CH2
Roo=-CH2CH2COOMe
17
ハヂー 18 ペリー 19
ヘハジ
●●●C aU〔】
-1104-
HETEROCYCLES,Vbl23,No.5,1985
REFERENCESANDNOTES
1.Presentedpartlyatthe1OthSymposユumonProgressinOrganicReactionsand
Syntheses,Tokyo,November'1983.SymposiumPapers,p121.Thisreportispart
XXVofaseriesentit1edoITheChemistryoモェndoles・I0PartXXェV:M・Somei,K・Kizu,Ⅲ、Kunimoto,andF・Yamada,Chem・Pharm・Bul1.,inpress、
2.Presentaddress:Pharmaceuticalエnstitute,TohokuUniversity,Aobayama,
Sendai,980,.apan.
3.a:K・Kawai,K・Nozawa,S・Nakajima,andY・エitaka,Ehem・Pharm・Bu11.,型,94~
(1984);b:T・OhmotoandK、Koike,些里.,翌,3198(1983);。:Y,Konda,M・
Onda,A・Hirano,andS・Omura,土土4.,28,2987(1980);ユ:H・WagnerandT. ̄~
Nestler,TetrahedronLetters'1978,2777;e:,.W・Nage1,K、G、R・Pach1er,P.S、ヘダーヂー
Steyn,R・V1eggaar,andP.L,Wessels,Tetrahedron,薯,2625(1976);≦:,.W・
ヘグ Nage1,K、G、R・Pachler,P.S・Steyn,P.L・Wesse1s,G・Gafner,andG..-コ.Kruger,j・Chem・SOC.,Chem・Comm.,1974,1021;98s.R、。。hns,。.A・Lamberton,and。.L、ヘリ、ン、’、>
Occo1owitz,Aust.。.Che、.,20,1737(1967);h:H・DUorimotoandN,Matsumoto,PLP
Zmn、Che、.,692,194(1966);i:H・MorimotoandH・Oshio,主b、.,682,212へグミソ、ヴ プレヘ’~
(1965);j:R・GmelinandZA・工.Virtanen,ActaChem・Scand.,16,ユ378(1962).夕、ジベジ
M・N○m○七。andS・Tamura,型ニニー旦主且」-些旦辺.,翌,1590(1970).
Ⅲ、SomeiandⅢ、Shoda,11竺竺2ニエニユニニ,唾,1523(1981).
Allmeltingpointsareuncorrected・A11oilycompoundsgavesatisfactoryhigh massdataandcrystallinecompoundsa丘ordedacceptablecombustiondata・エR
absorptionbandsareshownincm-1.1H-NMRsigna1sarereportedinpp、(8)
fromTMS・a:mp103.0-ユ04.5.C・エR(KBr)81661,1513.lH-NMR(CDC13):4.08(3H,
s),4.37(2H,s),7.01-7.51(3且,、),7.84(エH,s),8.01-8.34(エ11,m).DqSm/e:
225and223(、+);b:Oil・エR(錘1m):3346,エ652,15ユ0.lH-NMR(CDC13):2.21
(2H,brs,NH2),3.92(2H,brs),4.09(3H,s),6.82-7.60(3H,、),7.78(1H,
s),7.99-8.42(1H,、).MSm/e:204(M+);c8mp149.0-150.5°C・工R(KBr)83600-
3100(br),1656,1640.lH-NMR(CDCl3)82.06(3H,s),4.09(3H,s),4.53(2H,
d,。=4.4Hz),6.63(1H,brs),7.00-7.53(3H,、),7.90(1H,s),8.00-8.33(1H,
、).MSm/e8246(M+);。:mp49.0-50.5°C、エR(KBr)81637,1578.lH-NMR(CC14):
2.42(3H,s),4.00(3H,s),6.86(1H,s),6.78-7.27(3H,、),7.31(lH,s),
7.48-7.75(1H,、).MSm/e8228(M+);e:mp99.5--100.0°C(1it・l3mplO5-ユ06°C).
エR(KBr肥1621,1472,1308,1250.lH-NMR(CDC13)84.07(3H,s),6.80-7.68(5H,
、),7.41and7.91(eachlH,d,。=13.0Hz).MSm/e8218(M+);玉:Oil、エR(丘1m):
1548,1375.1H-NMR(cc14兆3.30(2H,t,。=7.2Hz),3.93(3H,s),4.43(2H,t,
J=7.2Hz),6.70-7.46(5H,、).MSm/e8220(M+);g8Spectraldatawereidentical
withthoseo五thenaturalproductreportedintheliterature、40i1.ェR(fi1m):
2241.lH-NMR(CDCエ3)83.71(2H,s),4.00(3H,s),6.72-7.63(5H,、).MSm/e:
186(M+);h8Oi1.エR(丘1m):3342,3227,1614,エ580,1451,1320.1H-NMR(CC14):
1.84(2H,brs,NH2),2.49-3.09(4H,、),3.87(3H,s),6.59-7.42(5H,、).MS
m/e:190(M+);i8Oi1.エR(だilm川1664,1532.lH-NmR(CCl4):2.76(2H,七,。=7.2
Hz),3.36(2H,C1,コ=7.2Hz),3.86(3H,s),6.39(エH,brs,NH),6.62-7.54(5H,
、),7.71(1H,brs).ⅢSm/e:218(M+);ユ:Oil・エR(Ei1m):3261,1642,1550.lH-
NMR(cc14兆1.74(3H,s),2.77(2H,t,。=6.4Hz),3.34(2H,q,。=6.4Hz),3.85
(3H,s),6.50-7.50(6H,、).MSm/e8232(M+);k:Oil・エR(Eilm):1643,1550.
lH-NMR(ccエ4):1.01(3H,t,。=7.0Hz),2.01(2H,q,。=7.0Hz),2.77(2H,t,.=
6.5Hz),3.35(2H,brq,。=6.5Hz),3.83(3H,s),6.58(1H,brs,NH),
●●● 、卯}一戸『〕〆【)
-1105-
NMR(CC14):1.19(3H,t,。=7.0Hz),2.63(2H,t,。=8.0Hz),2.73(2H,q,。=7.0 Hz),3.70(2H,t,。=8.0Hz),3.84(3H,s),6.71-7.44(4H,、).ⅢSm/e:228
(M+);m8Oi1.エR(fi1m)83297,1452.lH-NMR(CC14):1.02(3H,t,。=7.0Hz),
1.53-2.12(2H,、),1.67(1H,s,NH),2.42-2.79(2H,、),2.86-3.22(2H,、),3.
70-4.07(1H,、),3.84(3H,s),6.66-7.36(4H,、).MSm/e:230(M+);n:Oil・
エR(Eilm):3293,1456,1440.lH-NMR(CDC13)81.96(1H,s,NH),2.66(2H,brt,
。=6.0Hz),3.11(2H,t,。=6.0Hz),3.92(3H,s),4.00(2H,brm),6.81-7.46
(4H,、).MSm/e:202(M+):o:Oil・エR(丘1m)83272,1453.lH-NMR(CCl4):1.36
m,brs,NH),1.48(3H,d,。=6.6Hz),2.56(2H,t,。=6.0Hz),3.02(2H,q,。=
6.0Hz),3.86(3H,s),3.76-4.35(1H,、),6.56-7.36(4H,、).MSm/e8216(M+”
E8miscompoundwasquiteunstableoilanddetectedbyhighresolutionmass spectroscopy・Ca1cdどorC14Hユ4N208m/e8226.1105.Found:226.1108.エR(丘1m):
2930,1450;旦80m・工R(fi1m):1435.1H-NMR(CDC13)82.81(2H,t,。=8.0Hz),
3.90(2H,dt,。=8.0and2.5Hz),4.04(3H,s),6.71-7.61(4H,、),8.32(1H,br
s).MSm/e8200(M+);r:0,.エR(fユエ、):l625,1451.1H-NMR(CDC13):4.08(3H,
s),6.94-7.54(3H,、),7.70(1H,。d,。=5.2and1.2Hz),7.89(1H,。t,。=7.5
and1.2Hz),8.29(lH,d,。=5.2Hz),8.75(1H,brs).MSm/e:198(Ⅲ+);s:Oil・エR(且1m)81620,1569.1H-NmR(CC14)82.86(3H,s),3.94(3H,s),6.76-
7.40(3H,、),7.45(1H,d,。=4.8Hz〃7.80(1H,brd,.=7.2Hz),8.08(1H,d,
。=4.8Hz).MSm/e(212(M+);上:mp82.0-83.0°C・エR(KBr):2114,1729,1528,
1350.1H-NMR(CDCl3):1.16and1.40(each3H,s),2.20(lH,s),3.63(3H,s),
4.4エ(lH,s),7.08-7.77(3H,、),7.89-8.13(1H,、).MSm/e8261(Ⅲ+);且:、P
71.0-72.5°C・エR(KBr):2095,1706.lH-NMR(CDC13)81.13and1.59(each3H,s),
2.17(lH,s),3.24(lH,s),3.87(3H,s),6.65-7.32(3H,、),7.38-7.67(lH,、).
ⅢSm/e:229(M+);Z:、p44.0-46.0°C・エR(KBr)82100,1712.lH-NmR(CC14):0.95
and1.54(each3H,s),2.19(エH,sW2.81(2H,d,。=5.8Hz),3.83(3H,s),
4.50-5.ユ5(3H,、),6.57-7.33(3H,、),7.33-7.70(1H,、).MSm/e:269(M+);w:
Oil・エR(fユユ、)82102,1737,172エ.lH-NMR(CDC13ルユ.O4and1.52(each3H,s),
1.66-2.06(2H,、),2.27(lH,s),2.36-2.76(2H,、),3.47(3H,s),3.93(3H,s),
6.72-7.63(4H,、).MSm/e8315(M+).
K・Umehara,K・Yoshida,M・Okamoto,Ⅲ、エwami,H,Tanaka,M・KohsakaPandH・
エmanaka,L_△生生聖ユニニ,刃,1153(1984),Y・ChenandA・Zeeck,□、Zmtibiotics,
~7.
36,913(1983);Y・Koyama,K・Yokose,andL.。.DCユby,
~ ,45,グミ〆 Aor▲Bic
エ285(1981);H、A・Houwing,。.Wildeman,andZ1.M.vanLeusen, 。.Heterocvclic
Che、.,]し8,エエ33(1981)andreEerencescitedtherein.
 ̄=~
G,BUchiandC-P・Mak,L-2三gLg型1.,弩,1784(1977).
A、K・SinhababuandR.T・Borchardt,TetrahedmnLetterS,24,227(1983).
●● ●●’nm)『0-(x)(〕二『--『’一
 ̄ ̄ ̄ ̄〆、グ
G,A・O1ah,Y、D・Vankar,andB.G、B・Gupta,§ynthesエニ,1979,36.
Quiterecently,ハchesonetal・reportedtheEirstsynthesisoE9:R・皿・Acheson,ゲーグ
G、N・A1dridge,Ⅲ.C、K・Choi,。.0.Nwankwo,Ⅲ.A・Ruscoe,and。.D・Wallis,
..Che、、Res・Svno垣 .,1984,1301.
12. 。.Attenborrow,A、F、G・Cameror,。.H・Chapman,R、M・Evans,B、H・HensJA.B、A・
Uansen,andT・Walken,。.Che、、SOC.,1952,1094.
13.R、M・Acheson,P.G・Hunt,,.M・Litt1ewood,B・A・Murrer,andH.E・Rosenberg,
。.Che、、SOC.,perkmエ,1978,1117.
ReceiveL31stJanuary,1985
-1106-