Proton-Mediated Practical Synthesis of McGeachin-Type Bisaminals
作者:Hongguang Du、Jiaxi Xu、Zhanhui Yang、Yang Chen、Tingting Wang
DOI:10.1055/a-1490-1241
日期:2021.8
proton-mediated practicalsynthesis of McGeachin-type bisaminals from 2-(alkylamino)arenecarbaldehydes and primary amines is achieved, with trifluoroacetic acid as the proton donor. The use of a proton, a smallest electrophilic activator, allows previously inviable ortho-substituted anilines and linear and branched aliphatic amines to be viable substrates for McGeachin bisaminal synthesis. Overcoming
isolated from traditional African herbal medicine Cryptolepis sanguinolenta, and its broad spectrum of biological activities has been illuminated in past decades. In this study, neocryptolepine and its derivatives (1-49) were designed and synthesized from economical and readily available starting materials. Their structures were confirmed by protonnuclearmagneticresonance, carbon nuclearmagnetic resonance