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A simple synthesis of 7-substituted 1-acetyl-2,3-dihydroindoles

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A simple synthesis of 7‑substituted 1‑acetyl‑2,3‑dihydroindoles

著者 Somei Masanori, Kawasaki Toshiya, Ohta Toshiharu

journal or

publication title

Heterocycles

volume 27

number 10

page range 2363‑2365

year 1988‑01‑01

URL http://hdl.handle.net/2297/4312

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HETEROCYCLES,Vol、27,No.10'1988

ASエMPエJESYNIDHES工SOF7-SUBST工TUTED1-nCETYL-2,3-,エHYDROエNDOエES’

MasanoriSomei,*ToshiyaKawasaki,andmoshiharuOhta FacultyoEPharmaceuticalSciences,KanazawaUniversity

l3-エTakara-machi,Kanazawa920,.apa、

Abstract-7-Cyano-,7-hYdroxy-,7-methoxycarbonyl-,7-meth-

y1-,7-nitro-,and7-phenyl-ユーacetyr2P3-dihydroindolesarepre-

paredintwosteps(oronepot)Eroml-acety1-2,3-dihydroindole.

A1though7-substituted1-acetyl-2,3-dihydroindo1esaresuitablebui1dingb1ocksEor

thesynthesisorbioェogica11yinterestingindolealka1oids2havingasubstituentat

the7-position,theyareavai1ableonlythroughaユaboriousmultisteproute・Wenow wishtodescribeasimp1esynthesismethodforthemutiUzing(l-acetyl-2,3-dihydro-

indo1-7-y1)thal1iumbis(trif1uoroacetate)(2),readi1yavailab1eどroml-acetyl-2,3-二四夕

dihydroindole(1)asreportedprev1ously、3 aや

WeEirstapp1iedourstannation-thal1ation(tin-thal1)reaction4Eorobtaining7-

a1kY1and7-arylsubstitutedcompounds・Treatmentof2withtetramethyltininthe

Presenceoどacatalyticamountofpaエエadiumacetate(P。(OZAc)2)inN,N-dimethylform-

amide(DMF)atl20oCだ。r4haEforded1-acetyl-2,3-dihydro-7-methylindole5(3,mPPL戸

89-90.C)andlin328and45gyie1ds,respectively・Similar1y,l-acety1-2,3-dihydro-八ケ

7-Phenylindole(4,mpエ25.5-126.C)waspreparedisn358yieldtogetherwith638yield

◎だ1bythereactiono五ZvvithtetraphenyltinQ へP

エntroductiono五methoxycarbonylgroupintotheフーpositjpnundertheusualreaction

conditions6a’b wasnotsatisEactory・Thus,thereactiono丑zwithcarbonmonoxide

inthePresenceo全acata1yticamountofPd(OZkc)2inmethano1at80oC五or3h,造ol-

1。wedbythetreatmentwithetherealdiazomethane,a正ordedmethyll-acety1-2,3-di- hydroindo1e-7-carboxy1ate(5,mp1O3-ユO4pC)andユin278and44患yields,respective-

ェy・エnteresting1y,additionofchromiumhexacarbonyltotheabovereactionmedium wasnewエyEoundtoimprovetheyie1dofthedesiredproduct(5)remarkably・Using グー

onemo1areCIuivalentoどchromiumhexacarbonyl,5wasobtainedin52号yieユdtogether

withmethyl2,3-dihYdroindole-7-carboxylate(6,mp69-69.5°C)andlinU8and23g

-2363-

(3)

yieエ。s,respectively、

1-Acetyl-2,3-dihydroindole-7-carbonitr上1e(7,mp133.5-134°C,1it、7mpl24oC)couldヘグ゛

beproducedin698yjAeldbythereactionof2withfivemolarequivalentsofcu- 公〆

prouscyanide6b’cinDldFat120oCfor6h・Ontheotherhand,ourpheno1synthesis method8だromthaUiumcompoundwassuccessfu11yappliedto2anditsreactionwith

ヘア

cupricsuエモatepentahydrateinDDdF-H20(181,v/v)at125.CEor6haffordedl-acet- y1-2,3-dihydro-7-hydroxyindo1e(8,mp114.5-ユ15。Cノユit、9mp112-114°C)in62gyield.'U

OnepotsynthesisoE8Eromlcouユdbereadi1ycarriedoutin42g。verallyieldbyjV 〃v theinitialtha11ationwiththalliumtris(trinuoroacetate),followedbythereac-

ti。nwithcupricsu正atepentahydrate・

ConversionoEcarbon-thal1iumbondtocarbon-nitrogenbondisreportedbythereac-

ti。nwithsodiumnitrite・lOHowever,theattemptednitrationof2accordingtothe

reportedmethod1Ogave1-acety1-2,3-dihydro-7-nitroindo1e(9,mpl63-164oC)inpoor

ヘア

yield(3-268)undervariousreactionconditionsinadditiontovariab1eyie1ds(0-

268)of1-acetyl-2,3-dihydro-5,7-dinitroindole(10,mp217-2ユ8°C,1it・Uヘジ mp2エ0-212

。c).ZklthoughTaylorl21O andUemurareportedthatthereactionofthalliumcompounds withnitroniumioncouldnotchangethecarbon-thalliumbondtoacarbon-nitrogen bond,weexpectedthattheadditionofcupric(orcuprous)ionwouldalterthereac-

tiontothedesireddirection・Basedonthisidea,wejEina11yどoundanewmethod whichproducedthedesiredmononitrocompound(9)selective1y・Thus,treatmentoE2 へシ withtwomolarequivaエentsofcupricnitratetrihydrateinDMF-aceticanhydride(1:

1,v/v)at80oCfor5haE五orded468yieldoモ9withoutanydetectableamountoflO.

Generaエizationofthisreactionisnowinprogress・

エnconclusion,various7-substituted2,3-dihydroindolesareeasilyavaiユableutiliz-

ing2asacolmnonsyntheticintermediate,thoughoptimumreactionconditionsarenot へP

made・Sincetheiso1ationof2isnotnecessaryandonepotoperationispossible,3. J、P

thepresentmethodshouldfindconsiderab1eapp1icationinorganicsynthesis.

‐EiF

Tl(OCOCF

oE百.

AC

J△、

ゴ9IC

?ncooMecoc 、_NC JC

-2364-

(4)

HETEROCYCLES,Vol、27,No.70,7988

REFERENCESANDNOTES

1.ThisreportispartXェjVェ。どaseriesentitェedmTheChemistryo造ェndolesm・

PartXエjV:Ⅲ、Somei,S・Sayama,K・Naka,andF・YamadalII巨型22EZE些旦,雪,1585

(1988).

2.N.B,Perry.。.W、Blunt,andⅢ.H、G・Munro,Tetrahedron,響,1727(1988);K、

Takeshi,H・Shibata,Y・Matsushima,andT・エijima,

(1987);N・KaWahara,K・Nozawa,S・Nakajima,andK・

Colnmun.,ユ986,1495;。.E・Swagzdis,R、W・Wittendorf

Aqric・BiOLChem .,51,3445 SOC.'Che、.

Kawai,。.Che、.

じommun.,上りub,上495;。.E・Swagzdユs,R・W・Wittendorf,R・皿,DeMarinis,andB.A・

ヘジ、ソ、リ、シ

Mico.。.Pharrn・SCi。,75,925(ユ986);C・皿・Maes,P.S・Steyn,R・V1eggaar,G、W、グミ岸 Kirby,,.。.Robins,andW.M・Stark,g、CheXn・SOC._,Perkinエ,1985,2489.Seeヘリ、ジ、〆V

a1sore造erence3、

3.a)M・SomeiandY・Saida,且旦竺g2Z2L旦旦,翌,3エユ3(1985);b)Ⅲ、Solnei,囮.Funa-

moto,andT・Ohta,ibid.,26,1783(1987);c)M・Somei,Y・Saida,andN・Komura, ̄ヘグ Chem・Pharm・Bu11.,34,4116(1986);。)M・Somei,Y・Saida,T、Funamoto,andT.

Ohta,ibi4.,35,3146(1987).

4.M.Somei,F・Yamada,andK・Naka,Che、、Pharm・Bu11.,35,1322(1987).

5.R・エkanandY,Fetal,9.Che、.Eng・Data,L6,125(1971)[Chem・Abstr.,74,74〃

76253hu971)]、

6.a)R,C・RarockandC.A・Fellows,。.nm・Chem・SOC., 104,1900(1982);b)P.  ̄■〆、ゲ、

c)E、C・TaylorandZk.H、

Yamadaandm、Somei,’'二里222Xニユニニ,聾,1173(1987);

Katz,Tetrahedron型e七七.'25,5473(1984).

7.R・エkanandE・Rapaport,TetZahedmn,23,3823(1967).へ-

M.Somei,E・エwasa,andF・Yamada,1竺旦」222ユニユニニ,饗,3065(1986).

R、R・HuntandR.L・Rickard,Ⅱ.Chem・SOC.,(Cルエ966,344.~hプ、デー

n【)(】〕

10.s・Uemura,Z1.Toshimitsu,andM・Okano,且]坐=gユニュー旦旦ニニーユニRニュ,担,2582(1976);

里旦巫,Z.ChempSOc.,PerkinmranS、エ,1978,1076;B、DaviesandC.B,Thomas,ヘジーヘジー

ユl型.,翌Z5,65;E、C・Taylor,R、H・Danだ。rth,andA・McKilエ。p,。.or9.Chen1.,へグー、グー

38,2088(1973). ’、>

11.W.E・NolandandK.R・Rush,L-gm二」』ユユ.,翌,947(1964)

12.E、C・Taylor,H、W・A1t1and,andA・McKillop,。.or9.Che、.,40,3441(1975).

Received,12ndjuly,1988

-2365-

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