Summary
A dephthalylation step utilizing a novel enzyme, o-phthalyl amidase, was developed. This step was part of a potentially new large scale synthetic route for a novel beta-lactam antibiotic Loracarbef. The enzyme was isolated from the organism Xanthobacter agilis. Purification of the enzyme to near homogeneity was accomplished by a 3-step procedure. Studies indicated that the phthalimido group can be opened chemically to generate the o-phthalyl derivative. This enzyme then can remove the phthalyl group from o-phthalylated amides. Optimization of the process was achieved by combining these two hydrolysis steps. Conversion yields of 85–97.8% (mol/mol) were obtained from reactions at substrate concentrations of 5–10% (w/v).
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Briggs, B.S., Kreuzman, A.J., Whitesitt, C., Yeh, W., and Zmijewski, M.J. (1996) accepted by Journal of Molecular Catalysis : Enzymes
Briggs, B.S. and Zmijewski M.J. (1995) United States Patent 5,445,959
Jackson, B.G., Doecke, C.W., Farkas, E., Fisher, J.W., Gardner, J.P., Gazak, R.J., Kroeff, E.P., Misner, J.A., Pederson, S.W., Staszak, M.A., Trinkle, K.L. and Vicenzi, J.A. (1994). Chiral USA 94, 61.
Kukolja, S., Lammert, S.R., and Ellis, A.I. (1977). Croatica Chemica Acta 49, 779–795.
Zock, J.M. and Queener, S.W.; (1996) to be submitted to Gene
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Black, T.D., Briggs, B.S., Evans, R. et al. o-Phthalyl amidase in the synthesis of loracarbef: Process development using this novel biocatalyst. Biotechnol Lett 18, 875–880 (1996). https://doi.org/10.1007/BF00154613
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DOI: https://doi.org/10.1007/BF00154613