Sodium Hydroxide → 2-[(3R,4S)-4-{[(4-chloro-5-methyl-1H-pyrrol-2-yl)carbonyl]amino}-3-propoxypiperidin-1-yl]-4-(1-methyl-1H-1,2,4-triazol-5-yl)-1,3-thiazole-5-carboxylic acid

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Reaction Steps

Methyl 2-[(3S,4R)-4-{[(4-chloro-5-methyl-1H-pyrrol-2-yl)carbonyl]amino}-3-propoxypiperidin-1-yl]-4-(1-methyl-1H-1,2,4-triazol-5-yl)-1,3-thiazole-5-carboxylate (Example 196, 80 mg, 0.153 mmol) was dissolved in methanol (30 mL), and 2N sodium hydroxide (6 mL) was added and stirred at room temperature for 4 h. The methanol was completely evaporated and water (20 mL) was added. The aqueous layer was washed with diethyl ether (2×20 mL) and the aqueous layer was acidified to pH 3 with 2N hydrochloric acid (2.0 mL). The obtained solid was filtered and dried to afford 2-[(3R,4S)-4-{[(4-chloro-5-methyl-1H-pyrrol-2-yl)carbonyl]amino}-3-propoxypiperidin-1-yl]-4-(1-methyl-1H-1,2,4-triazol-5-yl)-1,3-thiazole-5-carboxylic acid 60 mg (75%) as solid.

Provenance & Evidence