Hydrochloric Acid → 5-Chloro-1H-pyrrolo[2,3-c]pyridine-2-carboxylic acid [2-(4-methoxyphenyl)-2-oxoethyl]amide

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Reaction Steps

Aqueous hydrochloric acid (2.1 mL, 2M) was added to a solution of 5-chloro-1H-pyrrolo[2,3-c]pyridine-2-carboxylic acid [2-(4-methoxyphenyl)[1,3]dioxolan-2-ylmethyl]amide (Preparation 49, 160 mg, 0.41 mmol) in acetone (20 mL). The mixture was heated under reflux for 90 min then allowed to cool to rt. The suspension was filtered then washed with acetone and air dried, to give the title compound as a pale yellow solid. δH (d6 DMSO): 3.86 (3H, s), 4.79 (2H, d), 7.08 (2H, d), 7.23 (1H, s), 7.77 (1H, s), 8.03 (2H, d), 8.58 (1H, s), 9.14 (1H, t), 12.31 (1H, br s). m/z (ES+)=344 [M+H]+; RT=3.34 min.

Provenance & Evidence