Photochemical conversion of cephalosporins, 1-carba(1-dethia)cep

Details Photochemical conversion of cephalosporins, 1-carba(1-dethia)cep Photochemical conversion of cephalosporins, 1-carba(1-dethia)cep

1989-03-15

1989-12-19

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415771, 20415772, 540205, 540301, 540229, 540215, B01J 1908

Patent

active

048881007

ABSTRACT:
A process for photochemically converting 3-exomethylene cephams (or 1-carba(1-dethia)cephams or and 1-oxa(1-dethia)cephams) from the corresponding 3-alkyl-3-cephem (or 1-carba(1-dethia)cephem or 1-oxa(1-dethia)cephem) is provided. Further provided are 3-cephams useful as intermediates to 3-cephem compounds.

REFERENCES:
Duhaime et al., J. Org. Chem., 1985, 50, 873-879.
I. A. Skinner and A. C. Weeden, Tetrahedron Letters, 4299, (1983).
M. J. Jorgenson, Chem. Comm., 137-138, 1965.
R. R. Rando and W. von E. Doering, J. Org. Chem., vol. 33, No. 4, Apr. 1968, pp. 1673-1675.
Y. Maki and M. Sako, J. Am. Chem. Soc., 99:15, Jul. 20, 1977, pp. 5091-5096.
Y. Maki and M. Sako, J. Am. Chem. Soc., 97:24, Nov. 26, 1975, pp. 7168-7170.
N. K. Capps et al., J. Chem. Soc., Chem. Commun., 1985, pp. 843-845.

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