Related Products of 873191-23-2, 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. 873191-23-2, name is 5-(Bromomethyl)-1,3-dimethyl-1H-pyrazole belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.
71 a) To a stirring solution of (2,5-dimethyl-2H-pyrazol-3-yl)-methanol (100 mg, 0.79 mmol) in diethyl ether (3 mL) is added PBr3 (25 muL, 0.26 mmol). The reaction is stirred at room temperature for 18 hours, then water is added. The diethyl ether layer is separated and stored over solid NaOH and used in Step 71 b without further characterization. 71b) BEMP (137 pL, 0.47 mmol) is added to a solution of (2-methyl-1H-pyrrolo[2,3- b]pyridin-3-yl)-acetic acid methyl ester (60 mg, 0.29 mmol) in DMF (0.8 mL). After 35 minutes, the diethyl ether layer from Step 71 a (1.8 mL) is added. After 3 days, the reaction is partitioned between water and 1:1 EtOAc/ether. The organic layer is washed with brine then evaporated. The residue is purified by flash column chromatography (49:1 EtOAc/MeOH elution) to furnish [1-(2,5-dimethyl-2H-pyrazol-3-ylmethyl)-2-methyl-1H- pyrrolo[2,3-b]pyridin-3-yl]-acetic acid methyl ester; MH+ = 313.
The synthetic route of 5-(Bromomethyl)-1,3-dimethyl-1H-pyrazole has been constantly updated, and we look forward to future research findings.
Reference:
Patent; NOVARTIS AG; NOVARTIS PHARMA GMBH; WO2005/123731; (2005); A2;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics