反应详情

To a hot solution of 1.0 g. of 6-(3,5-dichloro-4-methylphenyl)-3(2H)pyridazinone in 25 ml. of dioxane was added an excess molar amount (above 0.5 ml.) of methyl isocyanate and the mixture in a sealed vessel was allowed to stand at room temperature for 3 hours. Then, 5 ml. of n-hexane was added and the resulting mixture was cooled to give 1.0 g. of the desired product as needles of m.p. ca. 250° C. (with decomp.) (Yield 82%).

1. customthe mixture in a sealed vessel was allowed
2. temperaturethe resulting mixture was cooled
3. customto give 1.0 g