Analyzing the synthesis route of 61995-20-8

61995-20-8 Benzyl 3-oxopiperidine-1-carboxylate 1514169, apiperidines compound, is more and more widely used in various fields.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.61995-20-8,Benzyl 3-oxopiperidine-1-carboxylate,as a common compound, the synthetic route is as follows.,61995-20-8

Part A. Preparation of N-(benzyloxycarbonyl)-2-phenylmethyl-3-piperidone. A stirring solution of N-(benzyloxycarbonyl)-3-piperidone (1000 mg, 4.25 mmol) and pyrrolidine (454 mg, 6.38 mmol, Aldrich) in dry toluene (10 mL) in a round bottom flask fitted with a Dean-Stark trap was refluxed for 4 h. The reaction was conc. in vacuo to a orange oil. The oil was dissolved in dry acetonitrile (10 mL) and then benzyl bromide (800 mg, 4.68 mmol, Aldrich) was added. The reaction was heated to reflux for 16 h and then cooled to room temperature. The reaction was quenched by the addition of 1M HCl (50 mL) and then extracted with EtOAc (4*40 mL). The organic layers were combined, washed with brine, dried over Na2SO4, and conc. in vacuo to an oil. The oil was purified by flash chromatography (SiO2, 7-20% EtOAc in hexanes) to yield 86 mg of the product as a white solid. MS (ESI) 324 (M+H).

61995-20-8 Benzyl 3-oxopiperidine-1-carboxylate 1514169, apiperidines compound, is more and more widely used in various fields.

Reference:
Patent; Ko, Soo S.; DeLucca, George V.; Duncia, John V.; Santella, III, Joseph B.; Wacker, Dean A.; US6331545; (2001); B1;,
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