Total synthesis of the antimycoplasma antibiotic micacocidin
摘要:
A total synthesis of the antimycoplasma antibiotic micacocidin (1) is described. Construction of sterically hindered thiazoline 12 was achieved by a phosphorus pentachloride-mediated cyclization reaction of S-protected aryloylcysteine 11, and compound 1 with desired chirality at C-10 was favorably obtained from diastereomeric mixture 30 through formation of the Zn complex 31. (C) 1998 Elsevier Science Ltd. All rights reserved.
Discovery, Total Synthesis, and SAR of Anaenamides A and B: Anticancer Cyanobacterial Depsipeptides with a Chlorinated Pharmacophore
作者:David A. Brumley、Sarath P. Gunasekera、Qi-Yin Chen、Valerie J. Paul、Hendrik Luesch
DOI:10.1021/acs.orglett.0c01281
日期:2020.6.5
New modified depsipeptides and geometric isomers, termed anaenamides A (1a) and B (1b), along with the presumptive biosynthetic intermediate, anaenoic acid (2), were discovered from a marine cyanobacterium from Guam. Structures were confirmed by totalsynthesis. The alkylsalicylic acid fragment and the C-terminal α-chlorinated α,β-unsaturated ester are novelties in cyanobacterial natural products.