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Biocatalytic Acetylation of Primary Amines by Lipases under Orbital Shaking and Microwave Radiation

Yara Jaqueline Kerber Araújo
  • Laboratório de Química Orgânica e Biocatálise, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, Química Ambiental, J. Santa Angelina, São Carlos, 13563-120, SP, Brazil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ André Luiz Meleiro Porto
  • Laboratório de Química Orgânica e Biocatálise, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, Química Ambiental, J. Santa Angelina, São Carlos, 13563-120, SP, Brazil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2015-07-24 | DOI: https://doi.org/10.1515/boca-2015-0003


This paper addresses the effects of the concentration of lipases, temperature and solvent on the enzymatic acetylation of primary amines. (±)-Heptan-2-amine 1, (±)-4-phenylbutan-2-amine 2, (±)-1,2,3,4-tetrahydronaphthalen-1-amine 3 and (±)-2-methylcyclohexan-1-amine 4 were acetylated using 11 lipases to obtain amides under orbital shaking and microwave radiation. Under microwave radiation the same amines were acetylated only using the CALB. (±)-Heptan-2-amine 1 was subjected to kinetic resolution, under orbital shaking for 7 h employing CALB and ethyl acetate as acylating agent, and converted into (R)-N- (heptan-2-yl)acetamide 5 (c = 42%, 88% eep, hexane c = 52%, 81% eep, isopropyl ether; c = 40%, 65% eep, toluene). The reaction was fast (15 s) under microwave radiation in hexane and yielded acetamide 4 in high conversion (c = 91%), but without selectivity (5% eep).

This article offers supplementary material which is provided at the end of the article.

Keywords : Lipase; Biocatalysis; Amine; Amide; Microwave radiation; Candida antarctica


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About the article

Received: 2015-02-24

Accepted: 2015-06-12

Published Online: 2015-07-24

Citation Information: Biocatalysis, Volume 1, Issue 1, Pages 49–58, ISSN (Online) 2353-1746, DOI: https://doi.org/10.1515/boca-2015-0003.

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© 2015 Yara Jaqueline Kerber Araújo, André Luiz Meleiro Porto. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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