Sulfuric Acid → HCID 59208499, compound

Participants

Reaction Steps

A solution of 3 mL H2SO4 and 12 mL water were cooled in an ice water bath, and 2.3 g (23 mmol) CrO3 was added portionwise. The solution was added dropwise to a cooled (ice water bath) solution of 2.74 g (11.6 mmol) of isopropyl 2-chloro-4-(hydroxymethyl)-1,3-thiazole-5-carboxylate (Intermediate 13) in acetone (50 mL) The resulting mixture was stirred 4 hours with warming to room temperature. Isopropanol (2 mL) was added and stirring was continued for 15 min. The solution was diluted with water, saturated with NaCl and extracted 3 times with EtOAc. The EtOAc was washed with brine, dried (MgSO4) and concentrated to give 2.86 g of an oil. NMR: 1.3 (d, 6H), 5.1 (m, 1H), 14.1 (s, 1H).

Provenance & Evidence