Novel malyngamide structural analogs: synthesis and biological evaluation
摘要:
In the course of our search for new anticancer agents, a series of novel malyngamide derivatives were synthesized by sharpless asymmetric epoxidation, followed by Julia-Kocinski olefination reactions as key reaction sequence. Anticancer activities of all these derivatives were screened against IMR-32, SF-295, SKNSH, HeLa, Colon-502713, SW-620, and Hop-62 cell lines for the first time.
Total synthesis of malyngamide M and isomalyngamide M
作者:Jie Chen、Zi-Fa Shi、Ling Zhou、An-Le Xie、Xiao-Ping Cao
DOI:10.1016/j.tet.2010.03.004
日期:2010.5
The stereoselective synthesis of malyngamide M (1) was accomplished in nine steps from o-cresol in 12% overall yield. The key steps involved the Wittig reaction of an α-NHBoc aryl ketone 4 for the introduction of vinyl chloride functionality, an amidation of lyngbic acid 3 with a secondary amine 2 for the framework of target molecule, and an isomerization of a (Z)-vinyl chloride to the (E)-configuration
The (+/-)- and S-isomers of title compound I were prepared via a short and efficient route. The key features of the synthesis were the use of easily accessible materials, operationally simple reaction protocol and highly enantioselective lipase catalyzed esterification for the generation of the required chiron. Copyright (C) 1996 Published by Elsevier Science Ltd
Total synthesis of malyngamide X and its 7′S-epi isomer
Stereoselective syntheses of malyngamide X (1) and its 7'(S)-epimer are described. A Lewis acid (Et2AlCl) mediated anti-aldol reaction was employed to generate the stereocenters C-7 and C-8. The route is convergent and provides a convenient access to the synthesis of structural variants of malyngamide X. Stereochemistry at C-7' in the molecules of natural and synthetic 1, and 7'(S)-epi 1 was confirmed by NMR chiral solvation experiments. (c) 2007 Elsevier Ltd. All rights reserved.
A concise total synthesis of lyngbic acid, hermitamides A and B
作者:S. Satyanarayana、B.V. Subba Reddy、R. Narender
DOI:10.1016/j.tetlet.2014.08.125
日期:2014.10
A concise total syntheses of lyngbic acid, hermitamides A and B have been accomplished in a highly enantioselective manner involving CBS asymmetric reduction, hydroboration, and stereospecific Julia-Lythgoe olefination. (C) 2014 Published by Elsevier Ltd.