1,3-Dipolar cycloadditions to unsaturated organoboranes. III - Regio- and stereocontrolled access to boronic ester substituted isoxazolidines.

Article abstract of DOI:10.1016/S0040-4039(97)01560-8

Alkenylboronic esters undergo regio- and stereoselective 1,3-dipolar cycloadditions with nitrones. These reactions give access to boronic ester substituted isoxazolidines which can be easily converted by oxidation with hydrogen peroxide to the correspondi