An Improved and Simple Route for the Synthesis of 3-Quinuclidinone Hydrochloride

Author(s): Jigar Y. Soni , V. Premasagar , Sonal Thakore .

Journal Name: Letters in Organic Chemistry

Volume 12 , Issue 4 , 2015

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Graphical Abstract:


An improved method for the synthesis of 3-quinuclidinone hydrochloride 4 from piperidine-4-carboxylic acid 1 has been described. Reaction of piperidine-4-carboxylic acid 1 with thionyl chloride and ethanol gave ethyl piperidine 4-carboxylate 2. It was further condensed with methyl chloroacetate in presence of sodium carbonate to give ethyl 1-(2-methoxy-2- oxoethyl)piperidine-4-carboxylate 3. One pot Dieckmann reaction of 3 in presence of potassium tertbutoxide followed by hydrolysis and decarboxylation gave title compound azabicyclo[2.2.2]oct-3-one hydrochloride 4.

Keywords: 3-quinuclidinone hydrochloride, Dieckmann reaction, isonepecotic acid, Gram scale synthesis.

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Article Details

Year: 2015
Page: [277 - 279]
Pages: 3
DOI: 10.2174/1570178612666150113231048
Price: $58

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