Total syntheses of cis-cyclopropane fatty acids: dihydromalvalic acid, dihydrosterculic acid, lactobacillic acid, and 9,10-methylenehexadecanoic acid
作者:Sayali Shah、Jonathan M. White、Spencer J. Williams
DOI:10.1039/c4ob01863j
日期:——
cis-Cyclopropane fatty acids (cis-CFAs) are widespread constituents of the seed oils of subtropical plants, membrane components of bacteria and protozoa, and the fats and phospholipids of animals. We describe a systematic approach to the synthesis of enantiomeric pairs of four cis-CFAs: cis-9,10-methylenehexadecanoic acid, lactobacillic acid, dihydromalvalic acid, and dihydrosterculic acid. The approach commences
顺式环丙烷脂肪酸(顺式-CFAs)是亚热带植物种子油,细菌和原生动物的膜成分以及动物脂肪和磷脂的广泛成分。我们描述了一种合成四个顺式-CFA对映体对的系统方法:顺式-9,10-亚甲基十六烷酸,乳酸,水杨酸和二氢硬脂酸。该方法始于Rh 2(OAc)4催化的1-辛炔和1-癸炔的环丙烷化反应,并取决于使用同手性埃文氏助剂的外消旋2-烷基环丙-2-烯-1-羧酸的制备规模色谱分辨率。各个非对映异构体N的饱和度-环丙-2-烯-1-羰基羰基恶唑烷,然后精加工成烷基环丙基甲基砜,可以用各种ω-醛-酯进行Julia-Kocienski烯化反应。最后,皂化和二酰亚胺还原得到单独的顺式-CFA对映体。