中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | Octaethyl nonadecane-1,1,7,7,13,13,19,19-octacarboxylate | 217961-09-6 | C43H72O16 | 845.035 |
—— | 1,17-Dibromo-6,6,12,12-heptadecane-tetracarboxylic acid tetraethylester | 217961-08-5 | C29H50Br2O8 | 686.519 |
—— | Heptaethyl 20-bromoicosane-1,3,3,9,9,15,15-heptacarboxylate | 217961-10-9 | C41H69BrO14 | 865.894 |
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).