2-Thiophenecarbonyl chloride → HCID 21081970, compound

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Reaction Steps

2-Thiophene carbonyl chloride (160 μL, 1.5 mmol) was added to a stirred solution of Compound 73 (303 mg, 1.0 mmol) in pyridine (5 mL) under argon at 0° C. The solution was allowed to come to room temperature and further stirred overnight. The solution was poured into ice water and the solids formed were filtered. The solids were washed by excess water, dried, and recrystallized by ethyl acetate to yield 341 mg (83%) of white solids. M.P. 262° C. 1H NMR (DMSO-d6): δ 3.57 (s, 3H), 3.64 (m, 4H), 3.91 (m, 4H), 7.16 (m, 1H), 7.50 (d, J=3.2 Hz, 1H), 7.62 (d, J=9.0 Hz, 1H), 7.79 (m, 2H), 7.86 (s, 1H). EIMS m/z 414 (M+1). Anal. (C20H17ClN4O2S) C,H, N.

Provenance & Evidence