Vilsmeier reagents: Preparation of β-halo-α,β-unsaturated ketones
作者:Richard E. Mewshaw
DOI:10.1016/s0040-4039(01)80646-8
日期:1989.1
A new method for the preparation of β-chloro and β-bromo-α,β-unsaturatedketones from β-diketones is described. Utilizing Vilsmeier reagents (prepared from N,N-dimethylformamide and oxalyl chloride or oxalyl bromide) β-halo-α,β-unsaturatedketones are isolated in excellent yields.