The first asymmetric total syntheses of 3((1R,2R)- and 3((1S,2R)-2-(12-methyltridecyl)cyclopropyl)propanoic acid
摘要:
The first efficient total syntheses of 3((1 R,2R)- and 3((1S,2R)-2-(12-methyltridecyl)cyclopropyl)propanoic acid have been achieved following a chelation controlled modified Simmon-Smith cyclopropanation, Wittig reaction, Horner-Wadsworth-Emmons olefination, and p-toluenesulfonyl hydrazide catalyzed hydrogenation as key reactions in good overall yield. (C) 2012 Elsevier Ltd. All rights reserved.
The first total synthesis of the (±)-17-methyl-trans-4,5-methyleneoctadecanoic acid and related analogs with antileishmanial activity
作者:Néstor M. Carballeira、Nashbly Montano、Rosa M. Reguera、Rafael Balaña-Fouce
DOI:10.1016/j.tetlet.2010.09.083
日期:2010.11
The first totalsynthesis of the marine cyclopropane fatty acid (±)-17-methyl-trans-4,5-methyleneoctadecanoic acid was accomplished in eight steps and in 9.1% overall yield starting from 1-bromo-12-methyltridecane. The cis analog (±)-17-methyl-cis-4,5-methyleneoctadecanoic acid was also synthesized but in seven steps and in 16.4% overall yield. With the two isomeric cyclopropane fatty acids at hand it