反应详情

3-Methyl-1-phenylpyrazolin-5-one (1.74 g, 0.01 mol) was mixed with a methanol solution of 2-ethylthio-3-ethylbenzothiazolium tosylate. Triethylamine (1.01 g, 0.01 mol) was added. The mixture was stirred for 10 minutes, then concentrated and treated with isopropanol. The mixture was heated to dissolve the product, then water was added to cloud, and the mixture cooled to give crystals: 3.22 g (48%), mp 144°-147.5° C., λmax=379 (ε=25,000).

1. concentrationconcentrated
2. additiontreated with isopropanol
3. temperatureThe mixture was heated
4. dissolutionto dissolve the product
5. additionwater was added to cloud
6. temperaturethe mixture cooled
7. customto give crystals