Hybrids of vinblastine and phomopsin, designed by a molecular modelling study, were elaborated in order to target tubulin. The key step of the synthesis (fragmentation and insertion of vindoline) was mediated by an internal N-carboxyanhydride (or O-acylcarbamate). This reaction was diastereospecific and addition of silver salts could reverse the diastereoselectivity. Even if the synthesized compounds are inactive, this synthesis represents an original example of a C–N fragmentation mediated by a N-carboxyanhydride.
通过分子建模研究,我们设计出了针对微管蛋白的
长春新碱和
磷霉素混合物。合成的关键步骤(
吲哚啉的破碎和插入)由内部的 N-羧基酸酐(或 O-酰基
氨基甲酸酯)介导。该反应具有非对映选择性,加入
银盐可逆转非对映选择性。即使合成的化合物没有活性,这一合成也代表了由 N-羧基酸酐介导的 C-N 断裂反应的一个原始实例。