Adding a certain compound to certain chemical reactions, such as: 304693-70-7, name is 1-(2-Methoxyethyl)-1H-pyrazole-4-carbaldehyde, belongs to pyrazoles-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 304693-70-7, Product Details of 304693-70-7
In a sealed tube, under N2, intermediate 35 (211 mg; 1.37 mmol) and Ti(OiPr)4 (436 jiL; 1.83 mmol) were added to a solution of intermediate 11(300mg; 0.914 mmol) in THF(6 mL). The solution was stirred at 50C for 5 hours then at rt overnight. The reaction mixture was cooled to 5C and isopropyl magnesium chloride 2M in THF (2.28 mL; 4.57 mmol) was added dropwise. The reaction mixture was allowed to rise slowly to rt and stirred overnight. The reaction mixture was diluted with EtOAc and poured onto a 10% aqueous solution of K2C03. The precipitate was removed by filtration over Celite. Theorganic layer was decanted, washed with brine, dried over MgSO4, filtered and evaporated to dryness. The residue was purified by chromatography over silica gel (irregular SiOH, 40g; mobile phase: gradient from 0% MeOH, 100% DCM to 10% MeOH, 90% DCM). The fractions containing the product were collected and evaporated to dryness to give 0.337 g of an intermediate residue which was purified again bychromatography via reverse phase (stationary phase: YMC-actus Triart C18 lOjim30*150mm, mobile phase: gradient from 55% NH4HCO3 0.2%, 45% ACN to 0%NH4HCO3 0.2%, 100% ACN). The pure fractions were collected and evaporated todryness. The residue was freeze-dried with acetonitrile/water 20/80 to afford 120 mg(26%) of compound 71.
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 1-(2-Methoxyethyl)-1H-pyrazole-4-carbaldehyde, and friends who are interested can also refer to it.