Potassium Permanganate → 4-Oxo-5-[2-(N-BOC-4-Piperidinyl)ethyl]-4,5,6,7-tetrahydrothieno[3,2-c]pyridine

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Reaction Steps

A solution of 2-3 (3.25 g, 0.0093 moles) in acetone (100 ml) was treated at room temperature with KMnO4 (2.93 g, 0.0185 moles) and the resulting mixture was stirred for 1 hour. The mixture was then filtered (silica gel pad), concentrated and the residue purified by flash chromatography on silica gel eluting with EtOAc (2)/hexanes (3) to give pure 2-4 as an oil.

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