With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.149057-19-2,4-((Benzyloxy)carbonyl)-1-(tert-butoxycarbonyl)piperazine-2-carboxylic acid,as a common compound, the synthetic route is as follows.
Step A: 4-Benzyl 1-(tert-butyl) 2-carbamoylpiperazine-1,4-dicarboxylate. NH4HCO3 (9 g, 114 mmol) was added to a solution of 4-((benzyloxy)carbonyl)-1-(tert-butoxycarbonyl)piperazine-2-carboxylic acid (33 g, 91 mmol), Boc2O (25.7 g, 118 mmol), pyridine (4.3 g, 54 mmol), and 1,4-dioxane (462 mL). After 14 hours, the mixture was concentrated under reduced pressure. The residue was dissolved in ethyl acetate (300 mL) and the solution was washed with brine. The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to afford the title compound (36 g). This material was used in the next step without further purification. MS (ESI): mass calcd. for C18H25N3O5, 363.2; m/z found, 386.0 [M+Na]+.
149057-19-2, The synthetic route of 149057-19-2 has been constantly updated, and we look forward to future research findings.
Reference：
Patent; Janssen Pharmaceutica NV; Barbay, J. Kent; Chai, Wenying; Hirst, Gavin C.; Kreutter, Kevin D.; Kummer, David A.; McClure, Kelly J.; Nishimura, Rachel T.; Shih, Amy Y.; Venable, Jennifer D.; Venkatesan, Hariharan; Wei, Jianmei; (501 pag.)US2020/55874; (2020); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics