Phosphorus oxychloride → 5-chloro-6-n-propyl-3-methoxy-6H-1,2,4,6-thiatriazine-1,1-dioxide

Participants

Reaction Conditions

Reaction Steps

50 parts of phosphorus pentachloride were added to a stirred mixture of 44 parts of 6-n-propyl-3-methoxy-6H-1,2,4,6-thiatriazin-5-one-1,1-dioxide and 268 parts of phosphorus oxychloride at 22° C., and the batch was heated to 110° C. in the course of 20 minutes. After 7 hours' stirring under reflux, it was evaporated down under reduced pressure, giving 45 parts of oily 5-chloro-6-n-propyl-3-methoxy-6H-1,2,4,6-thiatriazine-1,1-dioxide; NMR (CDCl3): N-CH2 4.0-4.28.

Provenance & Evidence