A new trans-vinylogous ester anionequivalent which reacts with a variety of carbonyl systems has been developed. In addition, the concise total synthesis of (+)-brefeldin A utilizing facile acylation of this new variant of vinylogous acyl anionequivalent has been accomplished.
Total Synthesis of Streptogramin Antibiotics. (−)-Madumycin II
作者:Francis Tavares、Jon P. Lawson、A. I. Meyers
DOI:10.1021/ja954312r
日期:1996.1.1
A formal synthesis of (+)-brefeldin A
作者:Young-Ger Suh、Jae-Kyung Jung、Byung-Chul Suh、Young-Choon Lee、Soon-Ai Kim
DOI:10.1016/s0040-4039(98)01078-8
日期:1998.7
A formal synthesis of (+)-brefeldin A has been achieved via stereoselective construction of hydroxycyclopentane skeleton possessing the requisite hydroxyheptenyl side chain. The highly advanced intermediate 2 has been synthesized from the known Weinreb amide in 19 % overall yield of 11 steps. (C) 1998 Elsevier Science Ltd. All rights reserved.
The first stereo selective total synthesis of (3R),(5R)-5-hydroxy-de-O-methyllasiodiplodin and its epimer via an RCM protocol
The firsttotalsynthesis of (3R),(5R)-5-hydroxy-de-O-methyllasiodiplodin and itsepimer is reported from malic acid. The adopted approach is highly convergent and stereoselective. The strategy utilizes syn selective reduction and ring-closing metathesis as key steps.
作者:Young-Ger Suh、Jae-Kyung Jung、Seung-Yong Seo、Kyung-Hoon Min、Dong-Yun Shin、Yong-Sil Lee、Seok-Ho Kim、Hyun-Ju Park
DOI:10.1021/jo0110855
日期:2002.6.1
The total synthesis of (+)-brefeldin A has been accomplished via 15 linear steps in a 7.9% overall yield from the known Weinreb amide 6. The key parts of this approach include the stereoselective construction of the cis-disubstituted hydroxycyclopentane skeleton and the direct introduction of the C1-C3 acrylate moiety using a new variant of a trans-vinylogous acylanionequivalent.