in dichloromethane heating in a glass ampoule for 12 h ( under N2 or Ar) at 95°C; evapn. and distn. (vac.);

T=135°C; 18 h; Inert atmosphere;

With  methanol in  methanol; dichloromethane  dropwise addn. of the dichlorophenylborane to MeOH in CH2Cl2 (under N2 or Ar) at -78°C and stirring for 1 h; evapn. (vac.) while warming and distn. (vac.);