Introduction of a new synthetic route about Methyl 5-bromo-1-methyl-1H-pyrazole-3-carboxylate

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Methyl 5-bromo-1-methyl-1H-pyrazole-3-carboxylate, its application will become more common.

Reference of 1222174-92-6,Some common heterocyclic compound, 1222174-92-6, name is Methyl 5-bromo-1-methyl-1H-pyrazole-3-carboxylate, molecular formula is C6H7BrN2O2, 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.

A solution of intermediate 2a (506 mg) in dioxane (10 mL) was treated with LiOH solution (2 M, 1 mL) and the mixture was stirred at 70 C for 1 h. HCI (1 M) was added and the mixture was extracted with EtOAc. The combined organic layers were dried and the volatiles were removed under reduced pressure to yield the desired compound (84% yield).LC-MS (Method 2): m/z [M+H]* = 205.0 (MW calc. = 205.01 ); R, = 0.31 min.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Methyl 5-bromo-1-methyl-1H-pyrazole-3-carboxylate, its application will become more common.

Reference:
Patent; GRUeNENTHAL GMBH; NORDHOFF, Sonja; WACHTEN, Sebastian; KLESS, Achim; VOSS, Felix; RITTER, Stefanie; WO2014/108336; (2014); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics