1: With N,N-dimethyl acetamide; benzo[1,3,2]dioxaborole in dichloromethane 5 h; Heating; 2: With methanol; air in dichloromethane 1.5 h;

sodium hydroxide; borane; dihydrogen peroxide in tetrahydrofuran

carbon monoxide; palladium diacetate; 1,4-di(diphenylphosphino)-butane in ethylene glycol dimethyl ether T=150°C; P=5168 Torr; 16 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;