Construction of Thioamide Peptide via Sulfur-Involved Amino Acids/Amino Aldehydes Coupling
作者:Yanyan Liao、Xuefeng Jiang
DOI:10.1021/acs.orglett.1c03370
日期:2021.11.19
A sulfur-involved ligation for thioamide quasi-peptides was developed via aminoacids and amino aldehydes coupling. The key to the transformation was the chelation of copper with imines for chiral activation and fixation. In this environment, linear polysulfur decreased the alkalinity of single sulfur anions to prevent racemization caused by the interaction between sulfur and sodium sulfide. Dipeptides
An improved method for the preparation of desoxopeffides—reductions of endothiopeptides
作者:Frank S. Guziec、Loide Mayer Wasmund
DOI:10.1016/s0040-4039(00)94324-7
日期:1990.1
Three new procedures for the synthesis of desoxopeptides from endothiopeptides are reported: 1) Raney nickel desulfurizafion, 2) alkylation with triethyloxonium tetrafluoroborate followed by sodiumborohydride reduction, and 3) nickelboride reduction. Of these three, reduction with nickelboride was found to be superior due to high yields, reproducibility and convenience.