sodium hydroxide; dihydrogen peroxide

boron trifluoride diethyl etherate

in tetrahydrofuran; diethyl ether under N2, Me3SiCH2Cl dissolved in ether, added to stirred suspn. of Li in ether at -50°C, mixt. gradually warmed to -20°C for 1 h, insol. materials filtered at -20°C, soln. cooled to -60°C, BH3 in THF added with stirring; solvent stripped off, distd.;

in benzene under Ar; stirring for 5 min at 25°C; the mixt. was distd. onto cold finger at 80°C (10 mTorr), C6H6 was added, the soln. was distd. again;