# US 4,392,923 A · Process for preparing thiazolinozetidinone derivatives

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- Number: US 4,392,923 A
- Document ID: US4392923A
- Status: Granted
- Kind: A
- Application number: 06/406,505
- Filed: 1982-08-09
- Granted: 1983-07-12
- Earliest claimed: 1982-08-09
- Assignees: Otsuka Kagaku Yakuhin Kabushiki Kaisha
- Inventors: Sigeru Torii; Hideo Tanaka; Junzo Nokami; Michio Sasaoka; Norio Saito; Takashi Shiroi
- Web page: https://patentgrep.com/patent/US4392923A

## CPC

- C07D 513/04: Ortho-condensed systems
- C25B 3/00: Electrolytic production of organic compounds
- C25B 3/07: Oxygen containing compounds
- C25B 3/09: Nitrogen containing compounds
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- C25B: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR (anodic or cathodic protection C23F13/00; single-crystal growth C30B)

## Abstract

This invention provides a process for preparing a thiazolinoazetidinone derivative represented by the formula ##STR1## wherein R.sup.1 represents aralkyl group or aryloxymethyl group and R.sup.2 represents acyl group, the process comprising electrolyzing a compound of the formula ##STR2## wherein R.sup.1 is as defined above in the presence of a lower fatty acid.

## Claims

### Claim 1

A process for preparing a thiazolinoazetidinone derivative represented by the formula ##STR6## wherein R.sup.1 represents aralkyl group or aryloxymethyl group and R.sup.2 represents acyl group, the process comprising electrolyzing a compound of the formula ##STR7## wherein R.sup.1 is as defined above in the presence of a lower fatty acid.

### Claim 2 (depends on 1)

A process as defined in claim 1 in which a compound wherein R.sup.1 is benzyl is used.

### Claim 3 (depends on 1)

A process as defined in claim 1 in which a thiazolinoazetidinone derivative wherein R.sup.1 is benzyl and R.sup.2 is acetyl is prepared.

### Claim 4 (depends on 1)

A process as defined in claim 1 in which the lower fatty acid is at least one member selected from the group consisting of formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid and valeric acid.

### Claim 5 (depends on 1)

A process as defined in claim 1 in which the electrolysis is conducted in a mixture of a lower fatty acid and an organic solvent.

### Claim 6 (depends on 5)

A process as defined in claim 5 in which the organic solvent is tetrahydrofuran.

### Claim 7 (depends on 1)

A process as defined in claim 1 in which the electrolysis is carried out by using a supporting electrolyte.

### Claim 8 (depends on 7)

A process as defined in claim 7 in which the supporting electrolyte is at least one member selected from the group consisting of alkali metal salt of lower fatty acid, ammonium salt of lower fatty acid, amine salt of lower fatty acid and amine.

### Claim 9 (depends on 1)

A process as defined in claim 1 in which the electrolysis is effected at a temperature of -30.degree. to 80.degree. C.

### Claim 10 (depends on 1)

A process as defined in claim 1 in which the electrolysis is performed at a current density of 1 to 500 mA/cm.sup.2.

### Claim 11 (depends on 1)

A process as defined in claim 1 in which the electrolysis is conducted by passing current with an electric charge of 2 to 70 F/mol through the electrolyte.