Electric Literature of 100114-57-6, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 100114-57-6, name is 3-Cyclopropyl-1H-pyrazole belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.
Potassium carbonate (7.67 g, 55.56 mmol) was added to 3-cyclopropyl-1 H-pyrazole (2.0 g, 18.52 mmol) in dry DMF (20 ml_) at 25C and the mixture was stirred for 20 minutes. Ethyl bromoacetate (2.06 ml_, 18.52 mmol) was added then the mixture was stirred for 2 days at room temperature. The reaction mixture was neutralized with aqueous 1 M HCI, extracted with ether (40 ml_) and the organic extract was washed with brine (30 ml_), dried over sodium sulfate then evaporated in vacuo. The residue was purified by silica gel column chromatography eluting with hexane:EtOAc 88:12 to afford the title compound as a yellow oil (42%, 1 .50 g). 1H NMR (400 MHz, DMSO-d6): delta ppm 0.59 (d, 2H), 0.83 (d, 2H), 1 .19 (t, 3H), 1 .83 (m, 1 H), 4.13 (q, 2H), 4.91 (s, 2H), 5.94 (d, 1 H), 7.54 (d, 1 H)
The synthetic route of 3-Cyclopropyl-1H-pyrazole has been constantly updated, and we look forward to future research findings.
Reference:
Patent; PFIZER LIMITED; ANDREWS, Mark, David; BAGAL, Sharanjeet, Kaur; BROWN, David, Graham; GIBSON, Karl, Richard; OMOTO, Kiyoyuki; RYCKMANS, Thomas; SABNIS, Yogesh; SKERRATT, Sarah, Elizabeth; STUPPLE, Paul, Anthony; WO2014/53967; (2014); A1;,
Pyrazole – Wikipedia,
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