in methanol; diethyl ether T=0°C;

diazomethane in diethyl ether 5 deg C, 3 h, then r.t. overnight; Yields of byproduct given;

1)ether, 0-5 deg C, 2 h, then r.t. 1 day, 2) methanol, r.t. overnight; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;