Preparation and 1-carbon homologation of boronic ester substituted Δ2-isoxazolines: The 1,3 dipolar cycloaddition of nitrile oxides to vinyl boronic esters
摘要:
The dipolar cycloaddition of a variety of nitrile oxides to pinacol vinylboronate (2) is described. In addition, the 1-carbon homologation of the boronic ester substituted DELTA2-isoxazolines obtained from the cycloadditions has been carried out employing iodomethyllithium.