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. 1453-58-3, name is 3-Methylpyrazole, A new synthetic method of this compound is introduced below., Product Details of 1453-58-3
REFERENCE EXAMPLE 93; Methyl 4-(3-methyl-pyrazol-1-yl)-2-trifluoromethyl-benzoate; Step b) Methyl 4-(3-methyl-pyrazol-1-yl)-2-trifluoromethyl-benzoate: A suspension of hexane washed 60percent sodium hydride (3.85 g) in dry dimethylformamide (150 ml) was treated with the dropwise addition of a solution of 3-methylpyrazole (7.75 ml) in dimethylformamide (50 ml) under nitrogen at room temperature. Stirring was continueduntil the gas evolution subsided (10 minutes). A solution of methyl 4-fluoro-2-trifluoromethylbenzoate (17.8 g) fromstep a) in dimethylformamide (50 ml) was added dropwise to the clear solution. After stirring for 30 min. at room temperature the reaction was quenched with saturated ammonium chloride and extracted with ethyl acetate. The organic extracts (3x) were dried over anhydrous sodium sulfate and evaporated to dryness. The crude product was purified by flash column chromatography on silica gel (Merck 60) with a dichloromethane-hexane gradient (50percent – 75percent) to give 13.6 g of the title product as a colorless solid. m.p. 59-61°C MS (EI, m/z): 284 (M)+.
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.
Reference:
Patent; Wyeth; EP1000062; (2004); B1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics