Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 951626-95-2, name is Ethyl 4-oxo-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine-2-carboxylate, This compound has unique chemical properties. The synthetic route is as follows., COA of Formula: C9H11N3O3
Compound P (1.50 g, 7.17 mmol, 1.00 eq.) was dissolved in DMF (36.0 mL), cooled to 0 C. and treated with 60% sodium hydride in mineral oil (345 mg, 1.20 mmol, 1.20 eq.) in five portions. The reaction mixture was stirred for 15 min and 4-methoxybenzyl chloride (1.17 mL, 1.20 mmol, 1.20 eq.) was added. After 2 h, the reaction mixture was diluted with water (50 mL) and extracted with EtOAc (3*). The combined extracts were washed with water, brine, dried over Na2SO4, filtered, and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel (hexanes/EtOAc) to provide the title compound (2.25 g, 95% yield) as a pale yellow solid. 1H NMR (400 MHz, CDCl3) delta 7.28-7.25 (m, 3H), 6.91-6.89 (m, 2H), 4.71 (s, 2H), 4.43 (q, J=7.1 Hz, 2H), 4.41-4.38 (m, 2H), 3.82 (s, 3H), 3.69-3.66 (m, 2H), 1.42 (t, J=7.1 Hz, 3H). ES-MS [M+1]+: 329.9.
According to the analysis of related databases, 951626-95-2, the application of this compound in the production field has become more and more popular.