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. 151521-49-2, name is 4-Isopropyl-1H-pyrazol-5-amine, A new synthetic method of this compound is introduced below., category: pyrazoles-derivatives
Sodium (1.58 g, 68.7 mmol) was dissolved in EtOH (250 mL) and to this solution was added 4-isopropyl-lH-pyrazol-5-amine (3) (7.17 g, 57 mmol) and diethyl malonate (10.2 mL, 63 mmol). The solution was heated under reflux for 16 h, cooled to rt and concentrated in vacuo. The residue was dissolved in water (60 mL) and acidified to peta = 3 with 2 M HCl and the formed precipitate collected by filtration. The title compound ICEC0004 was obtained as an off-white solid (8.10 g, 35% over three steps). M.p. 242-2430C (ethanol).
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; EMORY UNIVERSITY; IMPERIAL COLLEGE OF SCIENCE AND TECHNOLOGY; JOGALEKAR, Ashutosh, S.; WO2008/151304; (2008); A1;,
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