TiCl<sub>4</sub>-Catalyzed Hydroboration of Ketones with Ammonia Borane
作者:P. Veeraraghavan Ramachandran、Abdulkhaliq A. Alawaed、Henry J. Hamann
DOI:10.1021/acs.joc.2c01744
日期:2022.10.7
Investigation of a variety of Lewis acids for the hydroboration-hydrolysis (reduction) of ketones with amine-boranes has revealed that catalytic (10 mol %) titanium tetrachloride (TiCl4) in diethyl ether at room temperature immensely accelerates the reaction of ammonia borane. The product alcohols are produced in good to excellent yields within 30 min, even with ketones which typically requires 24