MeOH in diethyl ether byproducts: MgCl2; inert atm.; absence of light; cooling (-65°C), stirring (3.5 h), standing overnight (-78°C); filtn., concn. (-40°C), extraction (n-pentane), washing (pentane), drying (vac.);

in neat (no solvent) inert atm.; absence of light; heating up to 415°C;