1: K2CO3 / methanol 2: saponification 3: MICA 4: potassium selenocyanate / methanol / Heating View Scheme

pyridine; trifluoromethylsulfonic anhydride; tris-(dimethylamino)-phosphine 1.) CH2Cl2, 0 deg C, 40 min, 2.) 0 deg C, 30 min; Yield given. Multistep reaction. Yields of byproduct given;