sodium hydroxide; N,N,N',N,-tetramethylethylenediamine; bis(cyclohexanyl)borane; dihydrogen peroxide 1) 0 deg C, 2 h, THF, 2) 0 deg C, 1 h; also with bis(1,2-dimethylpropyl)borane; Yield given. Multistep reaction. Yields of byproduct given;