Balancing Lewis Acidity and Carbocation Stability for the Selective Deoxyhalogenation of Aryl Carbonyls and Carbinols
作者:P. Veeraraghavan Ramachandran、Abdulkhaliq A. Alawaed、Henry J. Hamann
DOI:10.1021/acs.orglett.3c01462
日期:2023.6.30
Deoxyhalogenation of aryl aldehydes, ketones, carboxylicacids, and esters has been achieved utilizing an appropriate metal halide Lewis acid acting as a carbonyl activator and halogen carrier in combination with borane-ammonia as the reductant. Selectivity is accomplished by matching the stability of the carbocation intermediate with the effective acidity of the Lewis acid. Substituents and substitution patterns