Synthesis of the PMB Ether of 5,6-Epoxyisoprostane E2 through Aldol Reaction of the α-Bromocyclopentanone
作者:Hidehisa Kawashima、Yuichi Kobayashi
DOI:10.1021/ol500654g
日期:2014.5.16
5,6-Epoxyisoprostane E2 was synthesized via bromohydrination of the cyclopentene and aldol reaction of the alpha-bromocyclopentanone with the epoxyaldehyde. High regioselectivity in the bromohydrination was attained with recrystallized NBS and pyridine in aqueous DMSO. The enolate for the aldol reaction was generated by adding t-BuLi to the mixture of the a-bromocyclopentanone and ZnI2. This aldol protocol was applied successfully to several cyclopentanones and aldehydes.