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. 107862-65-7, name is 5,6-Dihydro-4H-pyrrolo[1,2-b]pyrazole, A new synthetic method of this compound is introduced below., Safety of 5,6-Dihydro-4H-pyrrolo[1,2-b]pyrazole
To a solution of 5,6-dihydro-4H-pyrrolo[l ,2-Z?]pyrazole (47.2 g, 437 mmol) and sodium acetate (36.2 g, 440 mmol) in acetic acid (750 mL) at 0C was added bromine (22.4 mL, 435 mmol). After 10 minutes, the reaction mixture was neutralized with saturated aqueous sodium bicarbonate and extracted with ethyl acetate (5 x 200 mL). The organic layers were combined, dried over magnesium sulfate, and concentrated under reduced pressure to afford 3-bromo-5,6-dihydro-4H-pyrrolo[l,2-6]pyrazole.
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; MERCK SHARP & DOHME CORP.; ALTMAN, Michael, D.; BIENSTOCK, Corey, E.; BUTCHER, John, W.; CHILDERS, Kaleen Konrad; DI FRANCESCO, Maria Emilia; DONOFRIO, Anthony; ELLIS, John Michael; FISCHER, Christian; HAIDLE, Andrew, M.; JEWELL, James, P.; KNOWLES, Sandra Lee; NORTHRUP, Alan, B.; OTTE, Ryan, D.; PETERSON, Scott, L.; SMITH, Graham Frank; WO2013/52394; (2013); A1;,
Pyrazole – Wikipedia,
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