at 8-12 atm in a sealed tube;;

at 8-12 atm in a sealed tube;;

in diethyl ether equimolar amts. of educts;

in pentane byproducts: (CH3)3SnCl; condensation of B-compd. into a soln. of (Me3Sn)2O in pentane at -196°C under N2, warming to room temp.; removal of volatile compds., sepn. of volatile compds. into product and solvent fractions at -78°C and -196°C, respectively, further sepn. yields (MeBO)3 and further B-compd. at -40°C, at-25°C oxadiborinane;

in pentane byproducts: (CH3)3SnCl; condensation of B-compd. into a soln. of (Me3Sn)2O in pentane at -196°C under N2, warming to room temp.; removal of volatile compds., sepn. of volatile compds. into product and solvent fractions at -78°C and -196°C, respectively, further sepn. yields (MeBO)3 and further B-compd. at -40°C, at-25°C oxadiborinane;

in cyclohexane byproducts: (CH3)3SnCl; exclusion of moisture; refluxing for 1.5 h, standing for a night at room temp.; filtration, washing with cyclohexane and ether, recrystn. from ether; elem. anal.;

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