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Syntheses of Guanidino-substituted Penicillins and Cephalosporins

Abstract

THE availability of 6-aminopenicillanic acid1 and 7-aminocephalosporanic acid2 has made possible the syntheses of a number of useful semi-synthetic derivatives3. We would like to report the preparation of a new class of penicillins and cephalosporins, which have in common the presence of a guanidino group. These compounds demonstrate quite remarkable in vivo potencies which we feel are attributable, at least in part, to low serum binding. The following examples are cited as important analogues of this series.

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References

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LEANZA, W., CHRISTENSEN, B., ROGERS, E. et al. Syntheses of Guanidino-substituted Penicillins and Cephalosporins. Nature 207, 1395–1396 (1965). https://doi.org/10.1038/2071395b0

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