Summary
The cleavage of A23187 to give a synthon (4) and the semi-synthesis from (4) of 2 Des-N-methylamino A23187 isomers (7a,b) are described. The antibiotic activities of the acids analogous to A23187(1), (2), (7a), (7b) are compared.
References
Hamill, R.L., Gorman, M., Gale, R.M., Higgens, C.E. and Hoehm, N.M., 12th Interscience Conference on Antimicrobial Agents and Chemotherapy, Atlantic City (N.J.) 1972, abstr. p. 32.
Tissier, C., Juillard, J., Dupin, M., and Jeminet, G., J. Chim. phys.76 (1979) 611.
Reed, P.W., and Lardy, H.A., J. biol. Chem.247 (1972) 6970.
Pfeiffer, D.R., Taylor, R.W., and Lardy, H.A., Annl. N.Y. Acad. Sci.307, (1978) 402.
Baker, E.P., in: Antibiotics. Ed. F.E. Hahn, Springer, Berlin 1979.
Chaney, M.O., Jones, N.D., and Debono, M., J. Antibiot.29 (1976) 424.
Alleaume, M., Barrans, Y., and Jeminet, G., submitted.
For confirmation of structure, we compared totally assigned1H (Anteunis, M.J.O., Bioorg. Chem.6 (1977) 1) and13C (David, L., Guittet, E., Lallemand, J.Y., and Beloeil, J.C., Nouv. J. Chim.5 (1981) 531) NMR-spectra of calcimycin with compounds2–7. Only characteristic peaks are given in this communication. For all the compounds, we used the unmodified numbering of calcimycin skeleton.
Shiozaki, M., Ishida, N., Iono, K., and Hiraoka, T., Tetrahedron36 (1980) 2736.
All the reactions were protected from light. The crude products were purified by TLC (silica gel, eluting with several solvents: cyclohexane-ethylacetate 50–50 (4,5b) cyclohexane-ethylacetate 70–30 (5a,6b) ether (6a), ethylacetate (7a,7b). All the analysis conform to the proposed formula.
Benzotriazol-1-yl-oxy-tris-(dimethylamino)-phosphonium hexafluorphosphat.
Castro, B., Dormoy, J.R., Dourtoglou, B., Evin, G., Selve, C. and Ziegler, J.C., Synthesis (Communication) (1976) 751.
Kanaoka, Y., Hamada, T., and Yonemitsu, O., Chem. Pharm. Bull.18 (1970) 587.
David, L. and Kergomard, A., J. Antibiotics35 (1982) 1409.
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Acknowledgment. The authors are very grateful to Drs G. Dauphin and J.Y. Lallemand for the NMR-spectra at 400 MHz performed in Gif-sur-Yvette, To Dr J.G. Gourcy and Mrs G. Kergomard for technical assistance.
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Prudhomme, M., Jeminet, G. Semi-synthesis of A23187 (calcimycin) analogs. Experientia 39, 256–258 (1983). https://doi.org/10.1007/BF01955290
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DOI: https://doi.org/10.1007/BF01955290