Claims
- 1. A process for producing an antibiotic of the formula ##STR4## or a pharmaceutically acceptable cationic salt thereof, characterized by the controlled hydrolysis of a compound of the formula ##STR5## or a cationic salt thereof.
- 2. A process for producing an antibiotic of the formula ##STR6## or a pharmaceutically acceptable cationic salt thereof, characterized by the controlled hydrolysis of a compound of the formula ##STR7## or a cationic salt thereof wherein the hydrolysis is carried out using para-toluene sulphonic acid in an acetonitrile/water solvent.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8618844 |
Aug 1986 |
GBX |
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CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a division of application Ser. No. 07/482,367, filed Feb. 20, 1990, now U.S. Pat. No. 4,992,466 which is a division of application Ser. No. 07/280,771, filed Dec. 6, 1988, now U.S. Pat. No. 4,912,130, which is a division of application Ser. No. 07/076,427, filed July 21, 1987, now U.S. Pat. No. 4,804,680.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4293650 |
Florent et al. |
Oct 1981 |
|
4359583 |
Mitzutani et al. |
Nov 1982 |
|
4565862 |
Foley et al. |
Jan 1986 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
0169011 |
Jan 1986 |
EPX |
53-21170 |
Feb 1978 |
JPX |
Divisions (3)
|
Number |
Date |
Country |
Parent |
482367 |
Feb 1990 |
|
Parent |
280771 |
Dec 1988 |
|
Parent |
76427 |
Jul 1987 |
|