nitric acid

(i) (irradiation), acetone, (ii) H2O; Multistep reaction;

dichlor(n-propyl)borane 1.) benzene, 60 deg C, 7 h, 2.) reflux, 1 h; Product distribution;

in benzene to a refluxing suspn. of octahydroxycyclobutane in C6H6 during 20 min dropwise was added diethyl(pivaloyloxy)borane; gas evolution for 1 h; cooled, filtered, washed with pentane; further purifn. by high vac. sublimation at ca 130-150°C or by crystn. from a large vol. of toluene;

in benzene byproducts: propane; to a refluxing suspn. of octahydroxycyclobutane in C6H6 during 20 min dropwise was added di-n-propyl(pivaloyloxy)borane; propane gas evolution for 1 h,; cooled, filtered, washed with pentane; further purifn. by high vac. sublimation at ca 130-150°C or by crystn. from a large vol. of toluene; elem. anal.;