With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.106261-48-7,4-((4-Methylpiperazin-1-yl)methyl)benzoic acid,as a common compound, the synthetic route is as follows.
A 50-mL, three-neck, round bottomed flask equipped with a magnetic stirrer was charged with 4- Methyl-N1-(5-thiophen-3-yl-pyrimidin-2-yl)-benzene-1,3-diamine (371 mg, 1.31 mmol), 4-(4-Methyl- piperazin-1-y(methyl)-benzoic acid (402 mg, 1.31 mmol), N,N-diisopropylethylamine (171 mg, 1.57 mmol), and anhydrous DMF (3.0 mL). To the resulting mixture were added 1-(3-dimethylaminopropyl)-3- ethylcarbodiimide hydrochloride (302 mg, 1.57 mmol) and 1-hydroxy-7-azabenzotriazole (89 mg, 0.655 mmol). After stirring for 20 h at ambient temperature, the reaction mixture was evaporated to dryness, purified by column chromatography (methanol/methylene chloride), and then triturated with acetonitrile, filtered and the filter cake dried under vacuum affording an 72% yield of Example 40 as a white solid. (at)HNMR (400 MHz, DMSO-de) No. 8.76 (s, 2H), 7.99 (d, 2H), 7.85 (s, 1 H), 7.66 (s, 1 H), 7.53 (m, 4H), 7.43 (d, 1 H), 7.23 (d, 1 H), 3.70 (m, 2H), 2.93 (m, 4H), 2.69 (m, 4H), 2.58 (s, 3H), 2.29 (s, 3H). MS m/z 499 [M++1, 106261-48-7
Big data shows that 106261-48-7 is playing an increasingly important role.
Reference：
Patent; SUGEN, INC.; WO2005/113548; (2005); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics