p-Toluenesulfonic acid monohydrate → Ethyl 3-acetamido-2-oxo-1,2,3,4-tetrahydroquinoline-3-carboxylate

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Reaction Steps

A solution of 1.0 eq. of 80 and 0.3 eq of p-toluenesulfonic acid hydrate in EtOH was refluxed for 2 hrs. The mixture was then stirred at rt for a time sufficient for reaction completion. After rotary evaporation, 100 mL of saturated aqueous NaHCO3 was added and the mixture was extracted with EtOAc. The combined organic extracts were dried over MgSO4 and vacuum filtered. The filtrate was rotary evaporated and dried under vacuum to yield 81.

Provenance & Evidence