Methyl Isocyanate → HCID 13921216, compound

Participants

Reaction Steps

To a solution of 1-(2-fluoro-4-chloro-5-isopropoxyphenyl)-3,5-dimethyl-4-aminopyrazole (29.8 g) in tetrahydrofuran (100 ml) was added one drop of triethylamine and then added dropwise a solution of methyl isocyanate (6.0 g) in tetrahydrofuran (50 ml). After the completion of addition, the reaction mixture was left to stand at room temperature for one hour. Removal of the solvent from the reaction solution by distillation in vacuo gave the titled compound (34.7 g) as a white crystalline solid. Recrystallization of the solid from a mixture of cyclohexane/acetone provided a white crystalline solid. m.p. 184°-185° C.

Provenance & Evidence