Synthesis of tetrasubstituted pyrroles by palladium-catalyzed cyclization of propargylic carbonates with β-enamino esters
摘要:
The reaction of propargylic carbonates with beta-enamino esters in the presence of palladium catalyst is described. Various tetrasubstituted pyrroles were regioselectively synthesized via a successive nucleophilic cyclization. (c) 2013 Elsevier Ltd. All rights reserved.
Cooperative Ni/Cu‐Catalyzed Asymmetric Propargylic Alkylation of Aldimine Esters
作者:Lingzi Peng、Zhuozhuo He、Xianghong Xu、Chang Guo
DOI:10.1002/anie.202005019
日期:2020.8.17
A novel Ni/Cu dual catalysis gives rise to fundamentally new cooperative reactivity and enables the regio‐ and enantioselective propargylic alkylation reaction. A diverse set of α‐quaternary propargylated amino ester derivatives were synthesized in good yields with excellent enantioselectivity (up to 99 % ee ). This work highlights the power of cooperativecatalysis, which can be expected to have broad