Borane catalyzed transesterification of -butyl esters using α-aryl α-diazoesters.

The B(CF)-catalyzed transesterification of a series of 3-alkenyl-oxindoles and other unsaturated -butyl esters with aryl-diazo esters is reported. This protocol is facile and generally high yielding proceeding under mild conditions and is remarkably chemoselective leaving the CC bonds intact.

B(CF)-catalyzed hydrogermylation of enones: a facile route to germacycles.

Organogermacycles are important skeletons for medicinal chemistry and materials. Herein, we reported a B(CF) mediated domino hydrogermylation reaction of enones with dihydrogermanes, affording 21 variants of organogermacycle compounds. These germacyclic compounds were obtained in good to excellent yields (up to 99% yield) under mild reaction conditions.