Electric Literature of 89202-89-1, A common heterocyclic compound, 89202-89-1, name is 1,4-Dimethyl-1H-pyrazole-3-carboxylic acid, molecular formula is C6H8N2O2, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
1 ,4-Dimethyl-1 /-/-pyrazole-3-carboxylic acid (190 mg) was weighed to a round bottom flask and thionyl chloride (1 ml) was added. The reaction was heated to reflux for 6 h then overnight at RT. After this time thionyl chloride was evaporated and the residue azeotroped with toluene to afford the title compound, 200 mg.1H NMR (CDCIs) delta 7.2 (m, 1 H), 3.98 (s, 3H), 2.27 (s, 3H).
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.