Organic compounds -- part of the class 532-570 series – Organic compounds – Chalcogen in the nitrogen containing substituent
Patent
1976-07-26
1979-03-20
Rizzo, Nicholas S.
Organic compounds -- part of the class 532-570 series
Organic compounds
Chalcogen in the nitrogen containing substituent
424246, 2602391, C07D50118
Patent
active
041455401
ABSTRACT:
Cephem and penam compounds having a partial structure of formula (II): ##STR1## wherein R.sup.1 and R.sup.2, respectively, represent a hydrocarbon group which is attached to P, either directly or through an oxygen atom, and which may optionally be substituted, and R.sup.3 is a hydrocarbon residue, are useful as intermediates for synthetic penicillins and cephalosporins, which in turn are useful as antibiotics or intermediates for some other synthetic penicillins and cephalosporins having antibiotic activity. To the 6- or 7-amino group of these penam or cephem compounds an objective acyl group can be introduced to give 6- or 7-acyl amino compound in a good yield, without isomerization of 6.alpha.-or 7.alpha.-substituent OR.sup.3 of the penam or cephem compounds.
REFERENCES:
patent: 3978053 (1976-08-01), Hanma et al.
patent: 3980644 (1976-09-01), Lunn
patent: 3987040 (1976-10-01), Cheng et al.
patent: 3997528 (1976-12-01), Yoshioka et al.
patent: 3998817 (1976-12-01), Fukumura et al.
patent: 4043991 (1977-08-01), Hamma et al.
Tetrahedron Letters No. 16, pp. 1307-1310 (1976).
Tetrahedron Letters No. 14, pp. 1307-1310 (1974).
Aki Osami
Morimoto Akira
Ochiai Michihiko
Okada Taiiti
Rizzo Nicholas S.
Takeda Chemical Industries Ltd.
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