Rhodium(II)-Catalyzed Reaction of 1-Tosyl-1,2,3-triazoles with Morita-Baylis-Hillman Adducts: Synthesis of 3,4-Fused Pyrroles
作者:Renmeng Jia、Jiang Meng、Jiaying Leng、Xingxin Yu、Wei-Ping Deng
DOI:10.1002/asia.201800057
日期:2018.9.4
A cascade reaction of rhodium azavinylcarbenes with Morita–Baylis–Hillman (MBH) adducts enables a novel synthetic approach to 3,4‐fused pyrroles. The cascade reaction begins with the insertion of O−H bond into rhodium azavinylcarbenes, subsquent sigmatropic rearrangement provides substituted α,β‐unsaturated cyclic ketone intermediates. Then the intramolecular aza Michael addition/oxidative aromatization
铑氮杂乙烯基卡宾与Morita–Baylis–Hillman(MBH)加合物的级联反应为3,4-稠合吡咯提供了一种新颖的合成方法。级联反应始于将OH键插入到氮杂乙烯基卡宾铑中,随后的σ重排提供了取代的α,β-不饱和环状酮中间体。然后,分子内氮杂迈克尔加成/氧化芳构化序列以良好的收率和出色的官能团相容性产生了各种3,4-稠合吡咯。