With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.91419-48-6,tert-Butyl 4-carbamoylpiperidine-1-carboxylate,as a common compound, the synthetic route is as follows.
91419-48-6, 2) Second Step: Synthesis of the t-butyl ester of 4-cyanopiperidine-1-carboxylic acid 2.05 g (9 mmol) of the t-butyl ester of 4-carbamoylpiperidine-1-carboxylic acid as obtained in the first step above were introduced into a Schlenck tube in the presence of 1.7 ml of DIEA (1-1 eq.). The medium was flushed under argon, and 18 ml of anhydrous THF were then added. The reaction medium was then cooled to a temperature of 0 C. and 1.38 ml of trifluoroacetic anhydride (1.1 eq.) were added dropwise. The medium then became totally clear. If the reaction is not complete after 1 hour, a further 0.5 equivalent of DIEA and then of trifluoroacetic anhydride are added. The reaction was monitored by TLC, staining with ninhydrin. At the end of the reaction, the organic phase was washed successively with aqueous solutions of 5% NaHCO3, 0.1N KHSO4 and saturated NaCl solution. The expected product was not visible under UV light. In the event of appearance of a UV-visible compound, a purification by flash chromatography in a gradient of eluent ranging from cyclohexane up to a 9/1 cyclohexane/ethyl acetate mixture may be performed. 1.1 g of a very pale yellow liquid that solidified after a few hours were obtained.1H NMR: (CDCl3): 3.63 (m, 2H), 3.36 (m, 2H), 2.8 (m, 1H), 1.84 (m, 4H), 1.45 (s, 9H).MS m/z: 211 (M++1)
91419-48-6 tert-Butyl 4-carbamoylpiperidine-1-carboxylate 2735646, apiperidines compound, is more and more widely used in various fields.
Reference£º
Patent; Institut Pasteur De Lille; Centre National De La Recherche Scientifique; Universite De Lille 2, Universite Du Droit Et De La Sante; Institut National De La Sante Et De La Recherche Medicale (Inserm); US2011/136823; (2011); A1;,
Piperidine – Wikipedia
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