Thermal rearrangement of trans-2,3-epoxy-1,3-diphenylbutan-1-one. A concerted 1,2-carbonyl migration
作者:Robert D. Bach、John M. Domagala
DOI:10.1039/c39840001472
日期:——
The thermalrearrangement of a chiral αβ-epoxyketone is concerted process that proceeds without loss of optical activity and with inversion of configuration at the migration terminus.
手性αβ-环氧酮的热重排是一致的过程,其进行而不会损失光学活性,并且在迁移末端不改变构型。
Catalytic Asymmetric Formal C–C Bond Insertion Reaction of Aldehydes via 1,2-Acyl Shift: Construction of All-Carbon Quaternary Stereocenters with Three Carbonyl Groups
作者:Hye-Min Jeong、Jin Won Lee、Dong Kyu Kim、Do Hyun Ryu
DOI:10.1021/acscatal.3c04726
日期:2024.1.5
The formal C–H bond insertionreaction into aldehydes via 1,2-hydride shift has been well established; however, the formal C–C bond insertion is more challenging. In the presence of chiral oxazaborolidinium ion (COBI) catalyst, the formal C–C bond insertion into glyoxals was developed via an 1,2-acyl shift for the construction of α-alkyl-α-formyl-β-ketoesters in high yield (up to 97%) with high enantioselectivity