been successfully realized for the first time using 0.1 mol % of borane catalyst generated in situ by hydroboration of pentafluorostyrene with HB(C6F5)2 to afford a variety of chromanones and flavanones in 60–99% yields. An attempt for the asymmetric transformation with chiral diyne and HB(C6F5)2 gave chromanones and flavanones in high yields with up to 32% ee.
首次成功实现了
色酮和
黄酮的 Piers 型氢化
硅烷化,使用 0.1 mol% 的
硼烷催化剂通过五
氟苯乙烯与 HB(
C6F5)2 的
硼氢化反应原位生成,得到 60-99% 的各种
色酮和
黄烷酮产量。尝试用手性二炔和 HB( )2 进行不对称转化,以高产率得到色满酮和
黄烷酮,ee 高达 32%。