Chlorosuccinimide → (αZ)-2-Amino-5-chloro-α-(methoxyimino)-4-thiazoleacetic acid

Participants

Reaction Steps

To a solution of (Z)-2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetic acid (15.0 g) in anhydrous DMF (150 mL) was added NCS (11.95 g) and the mixture was stirred at rt for 2-3 hrs. The reaction mixture was concentrated to remove most of the DMF. The resulting oil was added dropwise to DCM (˜600 mL) at 0° C. with stirring. Solid precipitation was collected by filtration, rinsed with DCM and dried under high vacuum to provide a brownish solid (11.8 g, 67%). ESI-MS (EI+, m/z): 236.0. 1H NMR (300 MHz, DMSO-d6) δ 7.60 (br s, 2H), 3.88 (s, 3H).

Provenance & Evidence