Chlorosulfonyl isocyanate → HCID 11822190, compound

Participants

Reaction Conditions

Reaction Steps

28.8 g (0.20 mol) of 5-ethoxy-4-methyl-2,4-dihydro-3H-1,2,4-triazol-3-one are introduced into 250 ml of methylene chloride, and the mixture is cooled to -10° C. 28.3 g (0.20 mol) of chlorosulphonyl isocyanate are added to this mixture, and the reaction mixture is stirred for 30 minutes without cooling. The solvent is then carefully removed by distillation under water pump vacuum. 53 g (93% of theory) of 2-chlorosulphonylaminocarbonyl-5-ethoxy-4-methyl-2,4-dihydro-3H-1,2,4-triazol-3-one are obtained as a crystalline residue of melting point 106° C.

Provenance & Evidence