Carbonyl Homologation via β-Trimethylsilyl β-Lactone Rearrangements. A Nonbasic Alternative to the Wittig Reaction
摘要:
Saturated and unsaturated aldehydes and ketones, when treated with trimethylsilylketene and BF3 for 16 hours, form beta-lactones which spontaneously rearrange to alpha, beta-unsaturated TMS esters; these hydrolyze during workup to form the corresponding carboxylic acids.