Hydrochloric Acid → Tert-butyl 2-({[2-(4-{2-[2-(acetylamino)-1,3-thiazol-4-yl]ethyl}phenyl)ethyl]sulfanyl}carbonyl)hydrazinecarboxylate

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Reaction Steps

To a solution of N-(4-{2-[4-(2-sulfanylethyl)phenyl]ethyl}-1,3-thiazol-2-yl)acetamide (368.0 mg, 1.201 mmol) in anhydrous tetrahydrofuran (30 ml) was added 1,1′-carbonyldiimidazole (291.4 mg, 1.797 mmol), and the mixture was stirred at room temperature for 1 hr. tert-Butyl carbazate (477.9 mg, 3.616 mmol), anhydrous tetrahydrofuran (2 ml) was added, and the mixture was stirred at room temperature for 19 hr. Water (20 ml), 1M hydrochloric acid (10 ml) and ethyl acetate (30 ml) were added, and the mixture was stirred, stood still and partitioned. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (FUJI SILYSIA CHEMICAL LTD. BW-300SP 30 g, ethyl acetate:hexane=1:1) to give tert-butyl 2-({[2-(4-{2-[2-(acetylamino)-1,3-thiazol-4-yl]ethyl}phenyl)ethyl]sulfanyl}carbonyl)hydrazinecarboxylate (469.9 mg, 1.011 mmol, yield 84.2%) as a white solid.

Provenance & Evidence