18048-64-1, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 18048-64-1, name is 1-(3,4-Dimethylphenyl)-3-methyl-1H-pyrazol-5(4H)-one belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.
1.86 g (9.16 mmol) of [1- (3,] 4-dimethylphenyl) -3- methyl-3-pyrazolin-5-one was dissolved in 3.6 ml of dry dimethylformamide, and 1.02 ml (11.0 mmol) of phosphorus oxychloride was added gradually under cooling with ice at [20C] or below. After the addition, the mixture was heated at [100C] for 2 hours, cooled to room temperature and poured into 30 ml of ice-cold water. Then, the mixture was washed with 10 ml of water and 10 ml of dimethylformamide. The mixed solution was stirred for 18 hours, and the precipitated solid was collected by filtration, washed with 20 ml of water and dried to obtain 1.03 g of the desired product as a pale brown solid (yield 49%). [1H-NMR] (ppm in [CDC13)] [5] = 2.29 (s, 3H), 2.32 (s, 3H), 2.43 (s, 3H), 7.20 (d, 1H, J = 8 Hz), 7.48 (dd, [1H,] J = 8 Hz, 2 Hz), 7.54 (d, [1H, J =] 2 Hz), 9.60 (s, 1H)
The synthetic route of 1-(3,4-Dimethylphenyl)-3-methyl-1H-pyrazol-5(4H)-one has been constantly updated, and we look forward to future research findings.