Syntheses of Guanidino-substituted Penicillins and Cephalosporins


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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    Batchelor, F. R., Doyle, F. P., Nayler, J. H. C., and Robinson, G. N., Nature, 183, 257 (1959).

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    Chauvette, R. R., Flynn, E. H., Jackson, B. G., Lavagnino, E. R., Morin, R. B., Mueller, R. A., Pioch, R. P., Roeske, R. W., Ryan, C. W., Spencer, J. L., and Heyningen, E. V., J. Amer. Chem. Soc., 84, 3401 (1962). See also ref. 3 (b).

  3. 3

    (a) An excellent summary of various aspects of these new penicillins and cephalosporins may be found in Doyle, F. P., and Nayler, J. H. C., Advances in Drug Research, edit. by Harper, N. J., and Simmonds, A. B., 1, 1 (Academic Press, London, 1964) For a recent comparison of the penicillinase-resistant penicillins and cephalosporins see (b) Barber, M., and Waterworth, P. M., Brit. Med. J., 344 (1964).

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    These and subsequent biological data will be the subject of a separate communication by Frost, B. M., Valiant, M. E., Thiele, E. H., and Robinson, H. J.

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    Doyle, F. R., Nayler, J. H. C., Woddington, H. R. J., Hanson, J. C., and Thomas, G. R., J. Chem. Soc., 501 (1963).

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    Morin, R. B., Jackson, B. G., Flynn, E. H., and Roeske, R. W., J. Amer. Chem. Soc., 84, 3400 (1962).

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LEANZA, W., CHRISTENSEN, B., ROGERS, E. et al. Syntheses of Guanidino-substituted Penicillins and Cephalosporins. Nature 207, 1395–1396 (1965).

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