The fully substituted cyclopentene ring with three stereogenic centers has been efficiently constructed for the first time using chiral bicyclic lactams, the insertion of the quaternary center being the key step; ring opening of chiral sulfates to the correct 1,2-dihydroxy substituents also played a major role in reaching 1 in suitable form (18) for further study.
利用手性双环内酰胺,首次高效构建了代号1的含三个立体中心的完全取代
环戊烯环,其中关键步骤是季碳中心的引入;手性
硫酸酯的开环反应对于生成1即适宜形式(18)的正确
1,2-二羟基取代物也发挥了重要作用,以便进一步研究。