Further exploration of the heterocyclic diversity accessible from the allylation chemistry of indigo
作者:Alireza Shakoori、John B Bremner、Mohammed K Abdel-Hamid、Anthony C Willis、Rachada Haritakun、Paul A Keller
DOI:10.3762/bjoc.11.54
日期:——
2-a]indol)-3-one (65%) and pyrido[1,2,3-s,t]indolo[1,2-a]azepino[3,4-b]indol-17-one (72%) heterocyclic systems. Ring-closing metathesis of the N,O-diallylic spiro structure and subsequent Claisen rearrangement gave rise to the new (1R,8aS,17aS)-rel-1,2-dihydro-1-vinyl-8H,17H,9H-benz[2',3']pyrrolizino[1',7a':2,3 ]pyrido[1,2-a]indole-8,17-(2H,9H)-dione heterocyclic system.
基于靛蓝的级联烯丙基化化学的多样性定向合成及其嵌入的2,2'-二吲哚核,可以迅速获得羟基8a,13-二氢氮庚庚酮[1,2-a:3, 4-b'] diindol-14(8H)-1骨架,最高收率51%。另外,当环烷基的烯烃的烯烃被生产时,新型桥联杂环7,8-二氢-6H-6,8a-环氧氮杂环庚烷[1,2-a:3,4-b']二吲哚-14(13H)-one的衍生物。烯丙基底物被末端二取代。进一步优化还产生了螺(吲哚啉-2,9'-吡啶并[1,2-a]吲哚)-3-one(65%)和吡啶基[1,2,3-s]衍生物的可行的一锅合成方法,t]吲哚并[1,2-a]氮杂环庚烷[3,4-b]吲哚-17-(72%)杂环系统。N,O-二烯丙基螺旋结构的开环易位和随后的Claisen重排产生了新的(1R,8aS,17aS)-rel-1,