1: 2.) NH3 / 1.) CH2Cl2, RT, 2h, 2.) MeOH 2: pyridine / Ambient temperature 3: 1.) 8N NaOH / 1.) DMSO, RT 4: Bu3SnH, AIBN / toluene / 100 °C 5: p-toluenesulfonic acid / CHCl3; methanol View Scheme

ammonia 1.) CH2Cl2, RT, 2h, 2.) MeOH; Yield given. Multistep reaction. Yields of byproduct given;