Stereospecific Cross-Coupling of Secondary Alkyl β-Trifluoroboratoamides
摘要:
The stereospecific cross-coupling of enantioenriched nonbenzylic secondary alkyl boron compounds has been achieved. The high selectivity toward product formation over an undesired beta-H elimination pathway is achieved via an intramolecular coordination of an ancillary carbonyl to the metal center in the diorganopalladium intermediate.
Copper-Catalyzed β-Boration of α,β-Unsaturated Carbonyl Compounds with Tetrahydroxydiborane
作者:Gary A. Molander、Silas A. McKee
DOI:10.1021/ol201900d
日期:2011.9.2
The copper-catalyzed beta-boration of alpha,beta-unsaturated carbonyl compounds with tetrahydroxydiborane has been developed. This diboron reagent allows direct, efficient access to boronic acids and their derivatives. Primary, secondary, and tertiary alpha,beta-unsaturated amides are converted to the corresponding beta-trifluoroboratoamides in good to excellent yields. The beta-boration of a variety of alpha,beta-unsaturated esters and ketones is also reported.
A General and Modular Approach to BCP Alkylamines via Multicomponent Difunctionalization of [1.1.1]Propellane
作者:Weichen Huang、Yongxiang Zheng、Sebastian Keess、Gary A. Molander