in methanol (N2 or Ar); dropped a soln. of B-compound into a soln. of Pd-complex; pptd. after 0.5 h; allowed to stand for 2 h at room temp. and for 2 h at -78°C; filtered; dried in vacuo; IR, NMR;

CH3COOH byproducts: CH3COOLi, C4H10;