Synthetic Route of 51985-95-6,Some common heterocyclic compound, 51985-95-6, name is Methyl 5-hydroxy-1-methyl-1H-pyrazole-3-carboxylate, molecular formula is C6H8N2O3, 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.
Intermediate 43a) Methyl 5-hydroxy-1 -methyl-1 H-pyrazole-3-carboxylate (2.0 g) was added at 0 ¡ãC to a solution of phosphorus(V) oxychloride (13.7 g) in dry DMF (3 g) and the mixture was heated to 120 ¡ãC for 4 h. After cooling to ambient temperature the reaction was quenched by the addition of ice water (100 mL) and the suspension was stirred for 30 min. The precipitated solid formed was isolated through filtration and was washed with water to yield the desired compound (56percent yield). LC-MS (Method 2): mlz [M+H]+ = 203.2 (MW calc. = 202.60); R, = 2.3 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-hydroxy-1-methyl-1H-pyrazole-3-carboxylate, its application will become more common.