BACH-EItrade; in 1,4-dioxane T=0 - 20°C; hydroboration;

in 1,4-dioxane N2-atmosphere; stirring (0°C), crystn. (room temp., 15 h); decanting, washing (pentane), drying (reduced pressure);

T=0 - 5°C;

1: With benzaldehyde T=50°C; Oxidation; 2: (Ipc)2BH With boron trifluoride diethyl etherate T=100°C; Oxidation; 1 h;

C10H16O4S in diethyl ether T=0°C; 1.5 h;

HCl in diethyl ether dry HCl in ether added to Ipc2BH-THF suspension at -78°C, stirring 15 min, warming to 0°C with stirring for complete soln. and gas evoln. ceased (2 h); solvent removal, cooling, prod. solidified, crystn. from pentane;

hydrogen bromide in pentane prepn. of a suspn. of freshly prepared borane in anhyd. pentane under N2, cooling to 0°C while a slow stream of HBr is passed through under stirring, stopping of stirring and standing at 0°C for 2-3 h; transferring of pentane soln. by cannula, solvent removal in vac., viscous residue is solidified by standing, recrystn. from cold pentane;

1: With methanol in tetrahydrofuran methanolysis; 2: (Ipc)2BH With sodium hydroxide; dihydrogen peroxide in tetrahydrofuran T=20 - 45°C; Oxidation;