Gold-Catalyzed Reactions of 2-Alkynyl-phenylamines with α,β-Enones
摘要:
The gold-catalyzed reaction of 2-alkynyl-phenylamines with alpha,beta-enones represents a new general one-pot entry into C-3-alkyl-indoles by sequential reactions. Gold-catalyzed sequential cyclization/alkylation, N-alkylation/cyclization, or N-alkylation/cyclization/alkylation reactions leading to different indoles can be directed by changing the 2-alkynyl-phenylamine 1/alpha,beta-enone 3 ratio and the reaction temperature. Unusual gold-catalyzed rearrangement reaction of indoles are observed at 140 degrees C. New gold-catalyzed formation of propargyl-alkyl ether under mild conditions and the hydration reaction of N-acetyl-2-ethynyl-phenylamine are reported.
Nucleopalladation Triggering the Oxidative Heck Reaction: A General Strategy to Diverse β-Indole Ketones
作者:Qian Wang、Liangbin Huang、Xia Wu、Huanfeng Jiang
DOI:10.1021/ol4027683
日期:2013.12.6
A simple and efficient palladium-catalyzedoxidative coupling between 2-alkynyl anilines and allylic alcohols is described by using cheap and green dioxygen as the oxidant. These cross-couplings have a large functional group tolerance and are of higher reactivity toward electron nonbaised allylic alcohols. The resultant β-indole ketones are readily converted to pharmaceutically significant β-indole
通过使用廉价的绿色双氧作为氧化剂,描述了2-炔基苯胺和烯丙基醇之间简单而有效的钯催化的氧化偶合。这些交叉偶联具有大的官能团耐受性,并且对电子非卤代烯丙基醇具有更高的反应性。所得的β-吲哚酮易于转化为具有药学意义的β-吲哚醇/胺和吡咯并[2,1- a ]异喹啉。
Gold-Catalyzed Reactions of 2-Alkynyl-phenylamines with α,β-Enones
The gold-catalyzed reaction of 2-alkynyl-phenylamines with alpha,beta-enones represents a new general one-pot entry into C-3-alkyl-indoles by sequential reactions. Gold-catalyzed sequential cyclization/alkylation, N-alkylation/cyclization, or N-alkylation/cyclization/alkylation reactions leading to different indoles can be directed by changing the 2-alkynyl-phenylamine 1/alpha,beta-enone 3 ratio and the reaction temperature. Unusual gold-catalyzed rearrangement reaction of indoles are observed at 140 degrees C. New gold-catalyzed formation of propargyl-alkyl ether under mild conditions and the hydration reaction of N-acetyl-2-ethynyl-phenylamine are reported.