报道了天然脂环二肽类抗生素球霉素和SF-1902 A 5的合成,利用固相技术构建了肽片段,并采用了一种新的不对称环氧化方法来制备脂质链。两个片段之间的键合在固相中成功完成,通过在从固体载体上裂解无环前体之前进行的大环内酯化反应完成了合成。这些合成物通过修饰氨基酸残基和脂质链提供了快速生成类似物文库的途径,从而基于对酶信号肽酶II的抑制,促进了具有有趣作用机制的新抗生素的鉴定。
Chemo- and stereoselectivity in the ring-openingreaction of epoxides with a reagent prepared from allylmagnesium halide and chlorotitanium triphenoxide is described. It has been proven that the allylating reagent can also be used for the reaction of epoxides bearing a tert-butyl ester, amide, or acetal moiety, and that the epoxide cleavage regioselectively takes place at the more substituted carbon