in methanol byproducts: NH3, CH3OH; all manipulations in Ar atm.; soln. of CsOMe in MeOH added to soln. of NH4 compd. in MeOH; concd., filtered or pumped to dryness at 25°C;

in methanol T=65°C; 2 h;

in methanol byproducts: NH3, CH3OH; all manipulations in Ar atm.; soln. of CsOMe in MeOH added to soln. of NH4 compd. in MeOH at -40 - -50°C; concd., filtered or pumped to dryness at 25°C;

in methanol T=65°C; 2 h;