Reference of 27006-76-4, A common heterocyclic compound, 27006-76-4, name is 5-Chloro-1,3-dimethyl-1H-pyrazole-4-carboxaldehyde, molecular formula is C6H7ClN2O, 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.
(3) 8.5 g of 5-chloro-1,3-dimethyl-1H-pyrazole-4-carbaldehyde (0.054 mol)Dissolved in methanol, add Pd / C (0.85g, 0.1w / w) andMgO (1.7g, 0.2w / w);The system was replaced with hydrogen three times;Under the condition of 1 atmosphere of hydrogen,Stir the reaction at 25 C for 16 hours;After the reaction was completed, the solid was removed by filtration (filter cake washing), the filtrate was concentrated under reduced pressure, dissolved in water, and extracted with ethyl acetate.The organic phase was concentrated to obtain 6.3 g of 1,3-dimethyl-1H-pyrazole-4-carbaldehyde as a pale yellow solid; purity 93%, yield 96%.
The synthetic route of 27006-76-4 has been constantly updated, and we look forward to future research findings.