sodium methylate in methanol 4 h; Irradiation;

1: 1.) BF3-Et2O/diglyme, NaBH4/diglyme; 2.) CrO3 / 1.) ether, 1 h; 2.) pyridine, 24 h, RT 2: 73 percent / pyridine; ethanol / 24 h / Ambient temperature 3: 24 percent / 0.5 N NaOCH3 / methanol / 4 h / Irradiation View Scheme

1: 73 percent / pyridine; ethanol / 24 h / Ambient temperature 2: 24 percent / 0.5 N NaOCH3 / methanol / 4 h / Irradiation View Scheme