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 total synthesis 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
海洋环丙烷脂肪酸 (±)-17-甲基-反式-4,5-亚甲基十八烷酸的首次全合成分八步完成,从 1-溴-12-甲基十三烷开始,总产率为 9.1%。的顺式类似物(±)-17-甲基-顺式-4,5- methyleneoctadecanoic酸还合成但在七个步骤和在16.4%的总收率。使用手头的两种异构环丙烷脂肪酸,可以通过相应甲酯的气相色谱共洗脱来明确证实天然存在的脂肪酸的反式相对构型。的顺式异构体为细胞毒性杜氏利什曼原虫前鞭毛体的IC 50 300.2 ± 4.2 μM。