Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 105486-72-4, name is Ethyl 5-bromo-1-methyl-1H-pyrazole-4-carboxylate, A new synthetic method of this compound is introduced below., Recommanded Product: Ethyl 5-bromo-1-methyl-1H-pyrazole-4-carboxylate
Phenol (30.29 g; 321.80 mmol) was dissolved in DMA and K2CO3 (88.95 g; 643.60 mmol) was added portion wise. It was stirred for 10 minutes, then 5-Bromo-1-methyl-1H-pyrazole-4-carboxylic acid ethyl ester (50.0 g; 214.53 mmol) was dropped to the reaction mixture and heated up to 140 C. for 16 hours. A 10% citric acid solution was added and extracted with DCM. The organic layer was washed with sodium bicarbonate and brine, then dried and purified through column chromatography. Yield: 43% (22.5 g; 91.37 mmol) HPLC-MS: (M+H)+=247; tRet=3.50 min; method LCMS FA-8
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.