Synthesis of hydrosilylboronates the monoborylation of a dihydrosilane Si-H bond and their application for the generation of dialkylhydrosilyl anions.

The synthesis of a series of hydrosilylboronates the selective iridium- or nickel-catalyzed monoborylation of dihydrosilane Si-H bonds is described. The synthesized silylboronates, which bear a single Si-H bond, can be used as novel silicon nucleophiles in the presence of transition-metal catalysts or bases. The first Si{H} NMR spectroscopic evidence for the formation of (-Bu)HSiLi, generated by the reaction of (-Bu)HSi-B(pin) with MeLi, is reported as the first example of a dialkylhydorosilyl lithium species.