Total synthesis and assignment of configuration of the thiazoline-based cyclopeptide cyclodidemnamide isolated from the sea squirt Didemnum molle
作者:Christopher D. J. Boden、Mark Norley、Gerald Pattenden
DOI:10.1039/a909363j
日期:——
A totalsynthesis of the proposed structure 1 for the oxazoline/thiazoline-based cyclopeptide cyclodidemnamide, isolated from the sea squirt Didemnum molle, is described. The synthesis features a novel double cyclodehydration, sequential formation of chiral thiazoline and oxazoline rings in a preformed cyclopeptide intermediate, as a key stratagem. The NMR spectroscopic data for synthetic 1 and natural
Total synthesis and revision of stereochemistry of cyclodidemnamide, a novel cyclopeptide from the marine ascidian Didemnum molle
作者:Mark C Norley、Gerald Pattenden
DOI:10.1016/s0040-4039(98)00365-7
日期:1998.5
A total synthesis establishes the structure and stereochemistry of the novel heterocycle based cyclopeptide cyclodidemnamide isolated from the "sea squirt" Didemnum molle as 1b, not 1a. (C) 1998 Elsevier Science Ltd. All rights reserved.
New methods and reagents in organic synthesis. 58.
The real structure of patellamide A, a cytotoxic lipophilic cyclic peptide from a marine tunicate, has been unambiguously determined by the synthesis of both its proposed and revised structures.