N-Heterocyclic Carbene-Catalyzed Domino Ring-Opening/Redox Amidation/Cyclization Reactions of Formylcyclopropane 1,1-Diesters: Direct Construction of a 6−5−6 Tricyclic Hydropyrido[1,2-<i>a</i>]indole Skeleton
作者:Ding Du、Linxia Li、Zhongwen Wang
DOI:10.1021/jo900650h
日期:2009.6.5
Catalyzed by N-heterocycliccarbenes (NHCs), domino ring-opening/redox amidation/cyclization reactions of the readily available formylcyclopropane1,1-diesters with 2-chloro-1H-indole-3-carboaldehydes were reported. This methodology provides an efficient and direct construction of a 6−5−6 tricyclic hydropyrido[1,2-a]indole skeleton, which can be potentially applied for the synthesis of several types
据报道,在N-杂环卡宾(NHC)的催化下,易得的甲酰基环丙烷1,1-二酯与2-氯-1 H-吲哚-3-碳醛的多米诺开环/氧化还原酰胺化/环化反应得到了报道。该方法学提供了一种有效的直接构建6-5-6三环氢吡啶并[1,2- a ]吲哚骨架的方法,可潜在地用于合成几种类型的多环吲哚生物碱。
A cascade deprotonation/intramolecular aldol reaction of α-carbonyl sulfonium ylides with 2-mercaptoindole-3-carbaldehydes and 2-mercaptobenzaldehydes to access thieno[2,3-<i>b</i>]indoles and benzothiophenes
The first catalyst-free cascade deprotonation/intramolecular aldol reaction of α-carbonyl sulfoniumylides with 2-mercaptoindole-3-carbaldehydes and 2-mercaptobenzaldehydes was developed. A series of thieno[2,3-b]indoles and benzothiophenes were smoothly obtained in high to excellent yields. The salient features of the protocol include catalyst-free conditions, an environment-friendly solvent, broad
开发了第一个无催化剂的α-羰基sulf烷基化物与2-巯基吲哚-3-甲醛和2-巯基苯甲醛的级联去质子/分子内羟醛反应。可以高收率或优异收率顺利获得一系列噻吩并[2,3- b ]吲哚和苯并噻吩。该方案的显着特征包括无催化剂条件,环境友好的溶剂,广泛的底物范围和大规模合成。
Organocatalytic enantioselective tandem sulfa-Michael/aldol reaction to access dihydrothiopyran-fused benzosulfolane skeletons bearing three contiguous stereocenters
The first organocatalytic diastereo- and enantioselective tandem sulfa-Michael/aldol reaction of 2-mercaptoindole-3-carbaldehydes and 2-mercaptobenzaldehydes with benzo[b]thiophene sulfones was developed. With multiple hydrogen-bonding thiourea as a catalyst, a wide range of polycyclic dihydrothiopyran-fused benzosulfolanes were smoothly obtained with excellent results (up to 99% yield, >20 : 1 dr
开发了第一个2-巯基吲哚-3-甲醛和2-巯基苯甲醛与苯并[ b ]噻吩砜的有机催化非对映和对映选择性磺胺-迈克尔/羟醛反应。用多种氢键合的硫脲作为催化剂,在温和的反应条件下,可以顺利获得各种多环二氢硫吡喃稠合的苯并砜类化合物,并具有优异的结果(产率高达99%,> 20:1 dr和99%ee)。
[EN] TRICYCLIC COMPOUND, AND PREPARATION METHOD THEREFOR AND MEDICAL USE THEREOF<br/>[FR] COMPOSÉ TRICYCLIQUE, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION MÉDICALE<br/>[ZH] 三环化合物及其制备方法和医药用途
申请人:THE NAT INSTITUTES OF PHARMACEUTICAL R&D CO LTD