3-Phosphonium and 3-phosphoranylidenecephems

Details 3-Phosphonium and 3-phosphoranylidenecephems 3-Phosphonium and 3-phosphoranylidenecephems

1982-01-22

1984-12-11

Coughlan, Jr., Paul M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Chalcogen in the nitrogen containing substituent

544 16, 544 29, C07D50124

Patent

active

044879270

ABSTRACT:
This invention relates to novel 7-acylamino-3-vinylcephalosporanic acid derivatives of high antimicrobial activity, to processes for preparation thereof from novel intermediates, and to said intermediates of the formula: ##STR1## in which R.sub.A is a group of the formula: ##STR2## wherein R.sup.1 is amino-substituted-heterocyclic group which may have halogen, protected amino-substituted-heterocyclic group which may have halogen, or a group of the formula: ##STR3## wherein R.sup.3 is lower alkyl,

REFERENCES:
patent: 3658799 (1972-04-01), Eardley et al.
patent: 4107431 (1978-08-01), Clark et al.
patent: 4255423 (1981-03-01), Beattie et al.
patent: 4266049 (1981-05-01), Bonjouklian
patent: 4278793 (1981-07-01), Burckheimer et al.

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