Claims
- 1. A compound of the formula LIV
- wherein X is sulphur or sulphinyl (R or S configuration), R.sup.3 is hydrogen or methoxy, R.sup.54 is hydrogen or a carboxyl protecting group and R.sup.4 is hydrogen, (1-4C)alkyl, halo(1-4C)alkyl, hydroxy(1-4C)alkyl, (1-4C)alkoxy(1-4C)alkyl, carboxy(1-4)alkyl, amino(1-4C)alkyl, cyano(1-4C)alkyl, (1-4C)alkanoylamino(1-4C)alkyl, allyl, furfuryl, benzyl or pyridyl(1-4C)alkyl; and R.sup.52 is aryliC.sub.1-4 alkyl, di-p-anisylmethyl, furylmethyl, arylC.sub.1-4 alkoxycarbonyl, triC.sub.1-4 alkylsilyl, C.sub.1-4 alkylidene, benzylidene, substituted benzylidene and phthalimido, and acid-addition and base-addition salts thereof.
- 2. The compound of formula LIV as claimed in claim 1 wherein R.sup.4 is an ethyl group.
- 3. The compound of formula LIV as claimed in claim 1 wherein R52 is a arylC.sub.1-4 alkoxycarbonyl group.
- 4. 7-amino-3-N-t-butoxycarbonylaminomethylceph-3-em-4-carboxylic acid.
- 5. The compound as claimed in claim 1 wherein R.sup.4 is a (1-4C) alkyl group.
Priority Claims (1)
Number |
Date |
Country |
Kind |
85 402266 |
Nov 1985 |
FRX |
|
Parent Case Info
This is a continuation of application Ser. No. 06/928,456, filed on Nov. 10, 1986, which was abandoned upon the filing hereof.
US Referenced Citations (7)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0224385 |
Jun 1987 |
EPX |
2103205A |
Feb 1983 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Chemical Abstracts vol. 107 236361x. |
Continuations (1)
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Number |
Date |
Country |
Parent |
928456 |
Nov 1986 |
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