LiBr/β-CD/IBX/H<sub>2</sub>O-DMSO: A new approach for one-pot biomimetic regioselective ring opening of chalcone epoxides to bromohydrins and conversion to 1,2,3-triketones
作者:Nishant Verma、Sumit Kumar、Naseem Ahmed
DOI:10.1080/00397911.2017.1315537
日期:2017.6.3
ABSTRACT Highly regioselective ring cleavage of chalcone epoxides to bromohydrins has been carried out in good yields with LiBr in the presence of β-CD using DMSO-H2O as solvent system. The ring-opened product, i.e., bromohydrin, was well adapted to IBX-mediated oxidation in such a fashion that the bromohydrins are transformed to their corresponding 1,2,3-triketones in moderate-to-good yields in one