Enantioselective synthesis of 3,5-disubstituted thiohydantoins and hydantoins
摘要:
A mild method to convert optically pure amino acid thiourea and urea derivatives to thiohydantoins and hydantoins, respectively, is described. It provides an efficient way to realize enantioselective synthesis of thiohydantoins and hydantoins with good to high isolated yields and enantiomeric purities. We found that the enantiomeric purities were highly dependent on the reaction conditions including bases, solvents, and temperature. (C) 2015 Elsevier Ltd. All rights reserved.
A traceless approach to amide and peptide construction from thioacids and dithiocarbamate-terminal amines
作者:Wenteng Chen、Jiaan Shao、Miao Hu、Wanwan Yu、Marc A. Giulianotti、Richard A. Houghten、Yongping Yu
DOI:10.1039/c2sc21317f
日期:——
with a range of unprotected side chains of aminoacid. The ability to produce amide or peptides by a traceless removal of the auxiliary is a significant virtue of the method. Meanwhile, the application of this new peptide-bond-forming reaction to the synthesis of novel endomorphin (EM) derivatives with various binding potencies was realized.