pyridinium chlorochromate in dichloromethane

1: 67 percent 2: 58 percent / sodium bis(trimethylsilyl)amide / tetrahydrofuran 3: 74 percent / KOH / aq. ethanol 4: 72 percent / PCC / CH2Cl2 View Scheme

1: 58 percent / sodium bis(trimethylsilyl)amide / tetrahydrofuran 2: 74 percent / KOH / aq. ethanol 3: 72 percent / PCC / CH2Cl2 View Scheme

1: 74 percent / KOH / aq. ethanol 2: 72 percent / PCC / CH2Cl2 View Scheme

N,N,N',N',N'',N''-hexamethylphosphoric triamide; n-butyllithium; pyridinium chlorochromate Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;