Carbonic acid-guanidine (1:1) → HCID 11382785, compound

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3-Amino-6-(4-hydroxy-piperidin-1-yl)-4-propyl-thieno[2,3-b]pyridine-2-carbonitrile (316 mg, 1.00 mol) (see Example 2) and guanidine carbonate (360 mg, 2 mmol) was mixed in a test tube. The mixture was heated to a melt for 15 min until the gas evolution stopped. After cooling to room temperature, the mixture purified by flash chromatography (35 g silica gel cartridge, 10% MeOH in dichloromethane, 30 mL/min for 15 min, Rf=0.25) to give the title compound as a yellow solid (120 mg, 33%).

Provenance & Evidence