Stereochemistry and total synthesis of janolusimide, a tripeptide marine toxin
摘要:
The stereochemistry of janolusimide, a lipophilic tripeptide marine toxin, has been fully elucidated by stereoselective synthesis of the lactam component (5S)-3,3'-dimethyl-5-isopropylpyrrolidin-2,4-dione. The peptide was then synthesized in 13 steps and in 0.8% total yield. (C) 2000 Elsevier Science Ltd. All rights reserved.
Stereochemistry and total synthesis of janolusimide, a tripeptide marine toxin
摘要:
The stereochemistry of janolusimide, a lipophilic tripeptide marine toxin, has been fully elucidated by stereoselective synthesis of the lactam component (5S)-3,3'-dimethyl-5-isopropylpyrrolidin-2,4-dione. The peptide was then synthesized in 13 steps and in 0.8% total yield. (C) 2000 Elsevier Science Ltd. All rights reserved.
N-Acylation of amides with acid anhydrides by way of dual activation using MgBr2·OEt2
作者:Shinji Yamada、Setsuko Yaguchi、Kaori Matsuda
DOI:10.1016/s0040-4039(01)02208-0
日期:2002.1
A new practical method for the N-acylation of amides is described. Acylation of various amides with acid anhydrides in the presence of MgBr2.OEt2 gave the corresponding N-acylamides in good to moderate yields. The present method is applicable to amides that are labile to acids or bases. (C) 2002 Elsevier Science Ltd. All rights reserved.