Improved synthesis of analgesic pentazocine

LIU Li; WANG Chen; LIU Lixin; JI Tingting

doi:10.11665/j.issn.1000-5048.20180508

LIU Li, WANG Chen, LIU Lixin, JI Tingting. Improved synthesis of analgesic pentazocine[J]. Journal of China Pharmaceutical University, 2018, 49(5): 568-571. DOI: 10.11665/j.issn.1000-5048.20180508

Citation:

LIU Li, WANG Chen, LIU Lixin, JI Tingting. Improved synthesis of analgesic pentazocine[J]. Journal of China Pharmaceutical University, 2018, 49(5): 568-571. DOI: 10.11665/j.issn.1000-5048.20180508

Citation:

LIU Li, WANG Chen, LIU Lixin, JI Tingting. Improved synthesis of analgesic pentazocine[J]. Journal of China Pharmaceutical University, 2018, 49(5): 568-571. DOI: 10.11665/j.issn.1000-5048.20180508

Improved synthesis of analgesic pentazocine

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A new synthetic process of pentazocine has been developed. Starting from 3, 4-dimethylpyridin and benzyl chloride, via quaternarization, Grignard reaction addition/reduction/salt, cyclization, hydrogenation, alkylation and recrystallization, pentazocine were obtained in a total yield of 8. 4%(with a molar mass of 3, 4-dimethylpyridin), with purity greater than 99. 97%. The improved synthetic route is suitable for industrial production.

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Improved synthesis of analgesic pentazocine

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