Water → Ethyl 3-[(2-amino-1,3-thiazol-5-YL)sulfanyl]propanoate

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Reaction Steps

5-Bromo-2-aminothiazole (25 g, 96 mmol) in DMF (150 mL) was added K2CO3 (26.5 g, 192 mmol) and the mixture was purged with N2 for 5 min. The mixture was cooled to 0° C. on an ice bath before 3-mercaptopropionic acid ethyl ester (12.9 g, 96 mmol) was added dropwise over the course of 30 min. The reaction mixture was stirred for 16 hs before water (400 mL) was added. The aquous mixture was extracted with Et2O (1×500 mL, 2×250 mL). The combined organic phases was washed with saturated NH4Cl (3×150 mL), dried (MgSO4). The solvent was removed in vacuo to give a dark residue which was purified by column chromatography (SiO2, EtOAc-heptane (1:1)). The solvent was removed in vacuo to give 11 g (49%) of the desired compound.

Provenance & Evidence