Hydrochloric Acid → HCID 59208447, compound

Participants

Reaction Conditions

Reaction Steps

Methyl 2-amino-4-[1-(2-methoxyethyl)-1H-imidazol-2-yl]-1,3-thiazole-5-carboxylate (Intermediate 5; 0.55 g, 2.2 mmol) was suspended in glacial acetic acid (20 ml) and concentrated HCl (30 ml). The solution was cooled to 0° C. and to this a solution of sodium nitrite in water (15 ml) was added dropwise. After stirring at 0° C. for 10 mins, the reaction was slowly warmed to room temperature and stirred for 1 hour. Once complete by LCMS, a solution of urea (0.25 g) in water (10 ml) was added dropwise. After stirring at room temperature for 30 mins, solvent was removed under reduced pressure. The residue was partitioned with sat. NaHCO3 (aq) and EtOAc. Extraction with EtOAc (×3), drying with MgSO4 and concentrating yielded an orange oil which was used without purification (0.20 g). MS (ES) (M+H)+: 302 for C11H12ClN3O3S; NMR: 3.34 (s, 3H), 3.62 (m, 2H), 3.81 (s, 3H), 4.22 (m, 2H), 7.24 (s, 2H).

Provenance & Evidence