Acylketene acetals in organic synthesis.
作者:Clark N. Eid、Joseph P. Konopelski
DOI:10.1016/s0040-4020(01)80937-6
日期:1991.1
reactivity of achiral and enantiomerically pure acylketene acetals are described. The key reactions of these substrates involve facile conjugate hydroboration and organolithium addition. Enantiomerically pure acylketene acetals were employed to generate a homochiral β-keto ketal through a highly diastereoselective lithium enolate quench. This β-keto ketal, which was also prepared through a desymmetrization
描述了非手性和对映体纯的酰基乙烯酮缩醛的制备和反应性。这些底物的关键反应涉及容易的共轭硼氢化和有机锂的添加。采用对映体纯的酰基乙烯酮缩醛,通过高度非对映选择性的烯醇锂猝灭反应生成同手性的β-酮缩酮。该β-酮缩酮,也通过对内消旋二酮的不对称缩酮化反应制得,被用于昆虫信息素sitophilure的合成。