in dichloromethane 1 h; Ambient temperature; Yield given. Yields of byproduct given;

in dichloromethane 1 h; Ambient temperature; Yield given. Yields of byproduct given;

(i) nBuLi, hexane, (ii) /BRN= 1209232/, PE; Multistep reaction;

in Petroleum ether byproducts: Me3SiCl; warming B-compd. and hydrazine in petroleum ether to room temp. under N2, pptn.; monitoring by (11)B-NMR, removal of solvent and Me3SiCl, recrystn. from petroleum ether, elem. anal.;

in Petroleum ether byproducts: Me3SiCl; warming B-compd. and hydrazine in petroleum ether to room temp. under N2, pptn.; monitoring by (11)B-NMR, removal of solvent and Me3SiCl, recrystn. from petroleum ether, elem. anal.;