Copper protection in the palladium catalyzed regioselective allylation of a model polyketide: Methyl 3,5-dioxohexanoate
作者:Jorge Marquet、Marcial Moreno-Mañas、María Prat
DOI:10.1016/s0040-4039(00)99414-0
日期:——
allylation of the model polyketide system methyl 3,5-dioxohexanoate at the C-2 position can be accomplished even with secondary and tertiary radicals by palladium catalyzed allylation of its copper(II) complex, 1a. Initial results indicate that the cobalt(II) complex, 1b, can be also useful. Cyclizations of the resulting diketoesters, 3, afford triacetic acid lactone derivatives, 5, regioselectively allylated
通过钯催化的铜(II)配合物1a的钯催化烯丙基化反应,即使在仲和叔基团的情况下,也可以在C-2位置完成模型聚酮化合物系统3,5-二氧己酸甲酯的区域选择性烯丙基化。初步结果表明,钴(II)配合物1b也可能有用。所得二酮酸酯3的环化,得到在C-3区域选择性烯丙基化的三乙酸内酯衍生物5。