methanol-d4; palladium on activated charcoal; hydrogen T=160°C; 24 h;

1: in tetrahydrofuran; diethyl ether T=0°C; 0.5 h; 2: With tetrakis(triphenylphosphine) palladium(0); copper(I) bromide in tetrahydrofuran; diethyl ether T=20°C; 3: With pyridine; pyridine hydrogenfluoride in tetrahydrofuran; diethyl ether; ethyl acetate T=20°C; 21 h;

Yield given. Multistep reaction;