• 検索結果がありません。

New Entry to 1,4,5,6-Tetrahydro-2H-Indol-2-Ones Using a Cationic 5-Endo-Trigonal Cyclization Onto Enamides

N/A
N/A
Protected

Academic year: 2022

シェア "New Entry to 1,4,5,6-Tetrahydro-2H-Indol-2-Ones Using a Cationic 5-Endo-Trigonal Cyclization Onto Enamides"

Copied!
5
0
0

読み込み中.... (全文を見る)

全文

(1)

New Entry to

1,4,5,6‑Tetrahydro‑2H‑Indol‑2‑Ones Using a Cationic 5‑Endo‑Trigonal Cyclization Onto Enamides

著者 Ishibashi Hiroyuki, Higuchi Masahiro, Masuko Hiromi, Kodama Kazuya, Ikeda Masazumi

journal or

publication title

Heterocycles

volume 46

page range 37‑40

year 1997‑01‑01

URL http://hdl.handle.net/2297/3279

doi: https://doi.org/10.3987/com-97-s8

(2)

H∈TERO仁一YCLES.V0l.ヰ6.1997   3ア  

一 丁.′ −ごi −・ ̄i−−−1‥∴・∴−!〔−〜 −.∴∴:−・・−∴.:・Jii−1ニ・二二、  

_・・・二・!モーごニー し.、−ミミi−JJ 二∴−こ−・∴−.‥・ミー/J∴.・ ̄∵/ニ・・_・ノブ ニ  

・_ −・_−:;..・ ̄∴−「−∴.・...−  −‥、!.−∵∵∴−−こ  

肋oy血貼hibashi,且*Masahi和田iguchi,1HiromiMasuko,2監a冨uya   監感ama,2昆ndMas詑um呈肱e血2  

二「ハ′イ′lり/・/・l一・・ご′′両・′叫・′′・・=・′・・′恒・∴丹・∫t・‥t・・・・し′こ′証‥・・川.、∴′・人〟tF・・∫∫t・t・・′′.  

−.−‖.′(i:L・・・・t・■・川・両い両′二∫二・・川・・・J∫、砧叫・・・J伸一′′ジ∫州・∴′・.、川、−∫、(中、  

U∴′し・J■′′・′ソ一.、川ハれ一叫′tい  

舶g細Cg叫An紺me曲od如tbesynthesまsofl,4,5,6一首細・ahyむot2好一   まm血1−2−OneSbymean50f5−g昂ゐ一打gg∂昂βgCyCliza血noぎα一曲ioc甜boca血ns   富enerated鮎msulゐⅩide(且望)andα−Chl併OSuはde(且7)isdescdbed。The  

Su蜘Ⅹide(且望),叩Om heatingwiもh TsOH,gaVe掴,Which el主minated   b紺Zenethiol盲Ogivete‡rahy血oindolone(且5).Byco旭ast,血echlorosul鮎e  

(且冒),岬On打eatmentwithTiC14,gaVethedesu助dzedもetrahy血oindolone  

(且富)℡Themechanism玩)rthefbrma血nof且呂isalsodiscussed。   

旦夕4,5舟甘e揉ahy釦0−2甜−in血ト2−OneS areuSe餌1intermedi離eS玩汀th6Synthesisoぎseveralもypes¢ぎ   A胴β野ggg∂αCββgalkaloids。軍orexamplesパheⅣイarylmetbyl)鹿dvatives(且:n=りhavingabromine¢r   豆感neatomon血eorがわposi血nof加甜Omaもicrlng,Wbensutjec首edtotbe独ckでeaC由oncondi由nsorto  

曲e恩田3Sn雄一me血紐dradicalcyclizationcondiもions,give独elycorineskele加5(望),1andtheⅣ−(呈一   野1細yl)c甜generS(且:n=2)havingelectron−血na由g3,4−dimeぬoxygroupsom鹿野Omatic血g,Wh印   訂ea舶繭ho柑anicacまds,prOVi鹿theerythrinans誠e伽S(3).1aチ2Hereinwerepor亡am紺紺叩tO   且,4ぅ5,6−陪㍑a臨画0一之好一i旭01−ま−OneSuSlnga5一紙ゐ一雨go乃βgCyClizationoぎα一蹴ocarboca血ns3asakey  

SleP・  

†孤呈spa阿isde此ate飢0血ememo‡yOぎ如詣ssoほmedtusShun−ichほamada帥ived噂O官職桓0)。   

(3)

HETEROCYCしES、Vol.46、1997  

38し   

¢ぼappmaCbto伽syn血sisoデモ紺地ydmindolonesisoutlinedinthe払1lowiれgScheme・珊ekeysもeplS   痛感5−g紹由一grgg¢柁dgCyCliza血noぎーheα一朗ocarbocations(尋)whichp和Vi由stheacyliminまum阜On   まn紐me血tes(5)。Thiss紐pisthen氏)1lowedbyanelimina血nofbenzenethiolもOgivel,4,5,6一蜘ahy血℃−  

3−metby抽iか2ガーindol−2−OneS(癌).Theα一面ocarbocations(名)canbeeasilydedved丘omぬe   CmSpOn亜ngsulfoxidesorα−Chlorosul負des。   

SPh 

R  

SPh   

4   5  

Weiniぬtedourinvestigationbyexaminingthecyclizationofthesu肋xide(且2)underthePumme陀r   rearrangementcon鮎ons.The synthesisoぎ且望was be卯nbycondensatiomof2−(phenyl血io)一   cyc址ex弧Ome(7)w抽β−bromobenzylamine($)餌lowedbyⅣ−aCylationof加resultingimine(撃)wi血  

bromoacetylbromideto由vethebromoacetamide(且桝in70%yまeld(basedon7)・取eatmentof且¢wi血   so血mmethylmercap舶egave,まn呂0%yield,thesul鮎e(且且),WhichwasoxidizedbysloⅥ/addi血nof椚−  

CP忍Atogivethesu肋Ⅹide(且2)in60%yieldalongwiththedisulfoxi血(且3)(21%yield)・  

BrCH2COBr  

Eモ3N,DMAP  

i一喜〒=− ̄l;l  

CH2Ar  

lO   toluene   

陀flux  

CH2Cl2  

00Ctort  

三こ  

≡=   

l  

苛闇謀Me  

CH2Ar  

椚  

Ar=かBromophenyl  

m−CPBA  

>   

CH2Cl2   

−200C  

CH2Ar   CH2Ar  

12   13  

Heatingthesulfoxide(且2)inboilingl,2−dichloroethaneinthepresenceofastoichiometricamountof  

TsOHfbf5mingavethehexahydmindolone(掴)andthetetrahydroindolone(且5)4in42and36%yields,  

TeSPeCtively。ThelH−NMRspectrumof且超showedittobeamixtureof‡wOdiastereoisomers(Cisand   transTelationshipsbetweenthephenylthioandthemethylthiogroups)inaratioofca・2:1・Theformation   of且5appearsもObe血eresul亡Ofanacid−Catalyzedeliminationofbenzenethioほomtheinitialcycliza血n   

(4)

HETEROCYCしES.Vot.46.1997    39  

is ら  

)Il    O−   

1e  

pro血c盲(且射・Indeed,Vh紺the period ofheating oぎ且望was extended呼号030m底地e   紐江娩y血血dolone(且5)wasobtainedasasoleproductin65%yield・  

Ontheo血erhand,heatingtbedisul払Ⅹide(且3)inthepresenceofTsOH(1equiv・)inboilingl,2一  

触h血oe血弧e氏汀5mingaveonlythetetrahy血oindolone(且5)in60%yidd・Abulkyphenykul昆nyl   許0叩0ぎぬeinitialcyclizationproduci(且卵mig如beinpositions細′7∫tO加adjacentmeぬylthiogro叩,  

組曲encea血ema圧1iminationofbenzenesul臨皿icacidappearedtooccurrap撼ytogive且雷.  

SPh …㌧rr。、;こミ∵.㌻・・ニト÷  

TsOH  

(1eq)  

12  

(CH2CI)2    re‖ux  

〔・HこAr  

14   

CH2Ar  

15   

ト  汀. 一皿 −n  

ーーー一幸− 15  

C W2Ar  16  

OuTattendonwasnextturnedtotheLewisacid−PrOmOtedcyclizationofthechlorosulfide(且7),Whichwas   prepared(quant.)翫)m血ecorrespondingsulnde(且且)bytreatingwithⅣCS・Whenthechloros扇員de(鼠7)  

WaSeXPOSedtoastoichiometricamountofTiC14inCH2Cl2atrOOmtemPeratuTefoTlh,iwoindolone  

deriva由veswereobtained。Oneofthemwasthecompound(且穏)(30%yield:aCa。5:1miⅩtureOftwo   diastereoisomeTS)whichwasidenticaltothatobtained免・Om且2。互nterestingly,anOtheronewasproven富O   be弧un舘peCtedproducモ(且8)(34%yield).Thel‡i一因MRspecモrumOぎ且$exhibiもedthesignalsat85.51  

(dt,J=1.7,4.7Hz)and85.85(brs)duetotheole員nicprotonsaモモheC7andC3positions,geSpeCtively.  

SPh 恕M:曝  

ヨ   8  

、・ ̄−‡?∴こ・… ̄二  

CH2Ar  

17  

NCS  

朋++ ≡陸・  

GCl4  

TiCl4  

>  

CH2Cl2  

00C拍「!  

CH2Ar   CH2A「   

14   18  

1爵+ 

PhS!  

CH2Ar   19   TiClかHC】(g)  

14   CH2C:12   

‖  

(5)

HETER亡ICY〔:し∈S、V0l.d6.1997   穏¢   

臨ゆ訂由訂官OSee血emecbanism玩)ご紬e毎mationoぎ且8(probabiyfiom風韻),SeVerale蒐pedmen組曲mswe陀   Ca感e虚o明電W油TiChandHCl卵S,宙臆1aモモegofwhicbmighta正seduri喝加蝕madonoぎ且尋誼om且冒。  

彗財hemeompound(且堵)wastr組‡edeitheヂW油astoichiome離camounモOfTiChorwith調C旦gasinCH2C12   aもぎ00mtempera紬でe,Only血est好餌唱mated崩wasァecove陀dunchanged。苫ioweveァ,馳a盲mem首0ぎ且堵w油   甘iC14in蝕ep托SenCeOぎHClgasgave且雷in29%y呈舶乞Og抽erw抽ana血損ionalpro血ct(且撃)(30%  

yie呈掛取e5訊ぬぎeOf且撃was鮎duced貪omまtsIH一因M鼠spe路um4andi盲SChemicaltrans董bma血n:  

ぬ組曲富且野w地TsO田inbeれZenea勤訂血d且5in甜%yield。¢nepossiblera由0れ裏ization良好曲eぬma血n   Of且露isbasedon加昆SSum卯10nぬも血emeぬy抽i(〕伊OupaモモheC3posまt呈onof蝕egrβ那−isomeroぎ風韻   CO甜通mates盲0甘まC払togivethe5日l払niumioni呈Iteme戯昆妃(望取組dth錯theαタZggre弘mi‡ladon∝CuぎSbyan   離抱C駄of血ecbloddei肺(dedved貪omHCl)onthe喜)henylぬiog和up拍gi甘藍且臥Tb呈sとypeOぎreacti耶,  

払珊eVe君9isinap妄)1icable盲0℃hecg∫−isomeroぎ且鼻先汀ぬestereoelectronicreasons,andhence血eど言ぶ一isomeぎ   ismerelypぎ0もOnatedもOg拉etheacyliminiumintemediate(望且).Thephe叩抽iogroupof望且undeァgoes  

l,2−mi卵血n血ougbtbeepisulねniumsalt望望toglVetheobserved且軌5  

Ch  け一⁚≠小  

SPh  

SMe  

O   

ーー園瑠窃   

硝 P  

−−一歩−19  

,   

6日2AF   望瑠  

CH=A「  

霊芝   

甘地swe陀Vealedthat血e5−ピアZ(わーgrggOタZβgCyClizationofα一thioc訂bocationsgen弧嘘d甜omthesu眼)蒐i由  

(且望)amdぬechlorosu抗de(且7)provi鮎danewme血odぬr血esyntbesisoぎadi壬籠renモモypeofl,4,5,6−  

もeぱahy血0−2ガーiれdoト2−OneSSuChas凰5and且臥Anapplicationof血emethodto血esyれthesisoぎ1ycodne   and母野血dnaa肱裏oidswillbeヱ℃pOriedin如ecourse.   

配EFEREFJCES AF旧 PJOTES  

且。(a)乱]ほ.殴igby andM.qabar9J、如才,Cゐe〝Z,ぶoc。,19919鳳凰3,8975;(b)J。H。汲igby,殴.C。  

Ht唱bes,andM.J.Heeg,才.加l.C如乱gOC.フ1995,且且7,7834;(C)J。H.鼠igbyandM。巳Mateo,  

∴・い小.∴J,・、・.Jl−、−、t,、∴ =ド、!!ニ  

2.A.Mondon,J。芝ander,am=軋−U.Menz,£gβ占∫g∫A肌Cムピアプ7,,1963,6痴ヲ,126.  

3。Y。Tamura9H。Maeda,S.Akai,and壬i。‡shibashi,TetrahedronLett。?1982,望3,2209;H.Ishibashi,  

監.Sato,討宜。互keda,H.Mae血,S.Akai,andY。Tamura,才.Cゐg乱ざocリグgr&gタZア招弧g,1985,605;  

H。亙shibashiandM.Ikeda,鮎γ.ガ2ggrOβgO椚Cゐe乱,1992,ヲ91別。  

礼]庖一因M監ぬ㌃且5(300MHz,CむC13)ニ∂1。83(qui鴫才=6.1田三,2軌2.28(q,♂=6.1H冨,2H),2.55   

(S,3盟),2。66(t,㌔=6.5Hz,2H),4朋(S,2H),6。46(盲,才=軋7Hz,2H),6。95−7.55(m,4H)。『or   且凱あ1.2−3.0(m,8H),2。53(S,3貴弘4。71(且ブ=ま5,6日z,1日),4.98牲才=15.6Hz,1報),7。05−  

7.60(m99壬恥  

5。‡もSeemSぎeaSOnabletoas紬methaモモhereactionof且7giv呈ng風韻and乱蕗provide5alsothecompound   且軌b朗mOCO‡TObor姐ngevid紺Ce知thisassumptlOniso鈍reda‖hemome眈  

Recejved,16thJanuary,1997   

参照

関連したドキュメント