Trifluoroacetic acid → 2-[3-(4-Chlorophenyl)ureido]-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxamide trifluoroacetate

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Reaction Steps

A stirred suspension of tert-butyl 3-carbamoyl-2-[3-(4-chlorophenyl)ureido]-4,5-dihydrothieno[2,3-c]pyridine-6(7H)-carboxylate (697 mg, 1.55 mmol) in 6 mL of DCM at rt was treated with 3 mL of TFA. The resultant solution was stirred at rt for 25 min whereupon it was concentrated in a rotary evaporator. The product was taken up in MeOH and the solution concentrated in vacuo (×2) to afford the title compound as a tan solid in quantitative yield. LRMS [M+H]351.

Provenance & Evidence