Enantioselective Synthesis of Cyclic Thioureas via Mannich Reaction and Concise Synthesis of Highly Optically Active Methylthioimidazolines: Discovery of a More Potent Antipyretic Agent
作者:Xianxing Jiang、Yiqing Wang、Gen Zhang、Dan Fu、Futing Zhang、Ming Kai、Rui Wang
DOI:10.1002/adsc.201100288
日期:2011.7
synthesis by the rapid construction of chiral molecular complexity around the biologically relevant framework using a highly efficient strategy is a key goal of organic synthesis. Herein, a highly efficient and convenient strategy that allows the rapid synthesis of highly optically active methylthioimidazolines through the novel rosin‐derived thiourea‐catalyzedasymmetric synthesis of cyclic thioureas with
Catalytic Enantioselective Synthesis of α,β-Diamino Acid Derivatives
作者:Le Li、Madhu Ganesh、Daniel Seidel
DOI:10.1021/ja9034494
日期:2009.8.26
Highly enantio- and diastereoselective organocatalytic Mannich additions of alpha-isothiocyanato imides to sulfonyl imines are reported. Enantiomerically enriched syn-alpha,beta-diamino acidderivatives can be obtained in excellent yields using catalyst loadings as low as 0.25 mol %.