Copper and cobalt mediated regioselective alkylation of polyketide models: methyl 3,5-dioxohexanoate and triacetic acid lactone
作者:Jordi Cervello、Jorge Marquet、Marcial Moreno-Mañas
DOI:10.1016/s0040-4020(01)89770-2
日期:1990.1
Regioselective C-alkylations at the intercarbonyl positions C-4 and C-2 of the polyketide model methyl 3,5-dioxohexanoate, 1, have been acomplished through reactions of its cobalt(II), 4a, and copper(II), 4b, complexes respectively. Some examples of double alkylations at both positions are presented. Cyclizations of the regioselectively substituted diketoesters so prepared gave triacetic acid lactone
通过其钴(II),4a和铜(II)4b的反应,完成了聚酮化合物模型3,5-二氧己酸甲酯1的羰基间位置C-4和C-2处的区域选择性C-烷基化,复杂。给出了两个位置上双烷基化的一些实例。如此制备的区域选择性取代的二酮酸酯的环化得到在C-5和C-3区域选择性烷基化的三乙酸内酯衍生物。