With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.259808-67-8,1-Boc-3,3-Dimethylpiperazine,as a common compound, the synthetic route is as follows.
General procedure: In a 1 L round-bottom flask with a magnetic stir bar, compound 7 (46 g, 0.2014 mol, 1.0 eq.) was diluted in DIEA (41.64 mL, 0.2416 mol, 1.2 equivalents) and THF (700 mL). Solid N-Boc piperazine (39.38 g, 0.2114 mol, 1.05 eq.) was slowly added in portions. A mild exothermic reaction was observed. The reaction mixture was allowed to stir at room temperature for 2 hours then was quenched with saturated NaCl solution (100 mL), water (400 mL), and EtOAc (500 mL). The layers were separated and the aqueous layer was extracted with EtOAc (2 x 200 mL). The combined organic layers were dried (Na2SO4) and concentrated to give a gray solid. The crude solid was stirred in 2:1 TBME/hexanes (300/150 mL) overnight. The solids were filtered then washed with hexane (250 mL) to recover 52 g of impure product. The TBME/hexanes slurry was repeated to recover 46 g (59%) of compound 8. All remaining impure material was combined and purified via silica gel chromatography (4:1 hexane/EtOAc) to recover another 11.2 g (14%) of 8 for a total combined yield of 57.2 g (74%).
259808-67-8, 259808-67-8 1-Boc-3,3-Dimethylpiperazine 22710387, apiperazines compound, is more and more widely used in various.
Reference£º
Patent; ARAXES PHARMA LLC; DENG, Xiaohu; LI, Liansheng; LONG, Yun Oliver; LIU, Yuan; REN, Pingda; MANI, Neelakandha S.; ALLISON, Brett D.; SALES, Zachary S.; LIANG, Jimmy T.; (71 pag.)WO2017/100546; (2017); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics