Following a new strategy, an improved total synthesis of the unique antibiotic octacidomycin (1) and of structurally related oligocarboxylic acids was developed (Scheme 1,2). Starting from 3 and the tetraethylester of 1,17-dibromo-6,6,12,12-heptadecane-tetracarboxylic acid (6 ) as a key compound, systematical fragment condensations lead to the nonatriacontanepentadecacarboxylic acid 11 and hence to the 1,3,9,15,21,27,33,39-nonatriacontane-octacarboxylic acid 1. The synthetic pathway can easily be modified and generally be applied for the synthesis of a broad variety of hitherto unknown oligocarboxylic acids or their esters, respectively, and even of cyclic analogues (Scheme 2).
根据新的策略,开发了一种改进的独特抗生素辛酸霉素(1)和结构相关寡羧酸的全合成方法(方案1,2)。从3和1,17-二溴-6,6,12,12-庚十七烷四羧酸酯(6)作为关键化合物开始,系统的片段缩合导致非三十七烷-十五烷四羧酸(11),进而得到1,3,9,15,21,27,33,39-非三十七烷-八羧酸(1)。合成途径可以轻松修改,通常适用于合成各种迄今未知的寡羧酸或它们的酯,甚至是环状类似物(方案2)。