Synthesis of (boryl)(silyl)iminomethanes by insertion of isonitriles into silicon-boron bonds

The insertion of alkyl and aryl isonitriles into the silicon-boron bond of silylboranes proceeded thermally to provide (boryl)(silyl)iminomethanes in moderate-to-good yields. The (boryl)(silyl)iminomethane reacted with borane (BH3) to give the corresponding borane complex in good yield, whose crystal structure was determined by a single-crystal X-ray analysis.