A new prenylation method using the lithium enolate of prenal. Reaction with polyunsaturated aldehydes. A short access to retinal.
作者:Lucette Duhamel、Jerôme Guillemont、Jean-Marie Poirier、Pierre Chabardes
DOI:10.1016/0040-4039(91)80022-x
日期:1991.1
The enolate of prenal 1 prepared from the corresponding silyl enol ether 2 or enol acetate 3 led to a γ-regiospecific reaction with polyunsaturated aldehydes 4 yielding dihydropyrans 5 leading after hydrolysis to polyenals 7. This process allows the introduction of the isoprenyl skeleton. A synthesis of retinal. from β-ionylidenacetaldehyde is reported.
由相应的甲硅烷基烯醇醚2或烯醇乙酸酯3制备的醛1的烯醇化物与多不饱和醛4发生γ-区域特异性反应,生成二氢吡喃5,水解后生成多烯醛7。该过程允许引入异戊二烯基骨架。视网膜的合成。据报道来自β-离子基乙醛。