反应条件
magnesium in diethyl ether Grignard-comp. prepd. from Br-compd. and Mg in ether at 0 °C was added dropwise to 1.5 equiv. of pre-cooled (0 °C) soln. of B(OMe)3 in ether, mixt. was maintained at 0-10 °C for 1 h and allowed to warm up to 20 °C; pouring into 10 percent HCl, org. layer was sepd., aq. layer was twice extd. with ether, extracts were combined, dried with MgSO4, evapd. under vac., end-product was contaminated with dehydration product;
