Thionyl Chloride → HCID 86614380, compound

Participants

Reaction Steps

2-{[4-(5-Chloro-2-methoxy-benzenesulfonyl)-3,4-dihydro-2H-benzo[1,4]oxazine-6-carbonyl]-amino}-thiazole-4-carboxylic acid, MS (ISP): m/e=508.3 (M−H), was prepared as described in example 1, steps 1 to 6. Step 5 was performed using thionyl chloride in toluene and dimethylformamide for the formation of the acyl chloride, and 2-amino-thiazole-4-carboxylic acid ethyl ester was used for the coupling, yielding 2-{[4-(5-chloro-2-methoxy-benzenesulfonyl)-3,4-dihydro-2H-benzo[1,4]oxazine-6-carbonyl]-amino}-thiazole-4-carboxylic acid ethyl ester, which was hydrolyzed in step 6.

Provenance & Evidence