1: With acetic acid in methanol T=20 - 65°C; 3 h; 2: With sodium tetrahydroborate; boron trifluoride diethyl etherate in tetrahydrofuran T=5°C; Heating / reflux;

tris-(dibenzylideneacetone)dipalladium(0); 2,2'-bis-(diphenylphosphino)-1,1'- binaphthyl; sodium t-butanolate in toluene T=80°C; 24 h;