With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.960283-58-3,(S)-tert-Butyl 2-methylpiperazine-1-carboxylate hydrochloride,as a common compound, the synthetic route is as follows.
Description 103; 1 ,1 -Dimethylethyl (2S)-4-[(2-chloro-4-nitrophenyl)methyl]-2-methyl-1 – piperazinecarboxylate (D103); A mixture of crude 1-(bromomethyl)-2-chloro-4-nitrobenzene (D102) (0.391 g), 1 ,1- dimethylethyl (2S)-2-methyl-1-piperazinecarboxylate hydrochloride (0.407 g, 1.72 mmol) and Hunig’s base (0.625 ml_, 3.59mmol) in dry DMF (3 mL) was stirred at room temperature for 10 minutes. The reaction mixture was concentrated to give an orange oil which was dissolved in DCM and washed with water (x2) and brine, then dried and concentrated to give an orange oil. Purification by column chromatography eluting with 0-30% EtOAc/pentane gave the title compound as a yellow oil (0.199 g). deltaH (CDCI3, 400MHz) 8.24 (1 H1 d), 8.12 (1 H, dd), 7.77 (1 H, d), 4.24 (1 H, br.s), 3.85 (1 H, d), 3.63 (2H, s), 3.14 (1 H, td), 2.76 (1 H, m), 2.59 (1H, m), 2.33 (1H, dd), 2.18 (1 H, m), 1.47 (9H1 s), 1.28 (3H1 d). MS (ES): MH+ 370/372,
960283-58-3, 960283-58-3 (S)-tert-Butyl 2-methylpiperazine-1-carboxylate hydrochloride 45072182, apiperazines compound, is more and more widely used in various fields.
Reference£º
Patent; GLAXO GROUP LIMITED; WO2008/729; (2008); A1;,
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