Patent US1676790A successfully refreshed from Google Patents.
Patent US4482435A successfully refreshed from Google Patents.
US4482435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing thiazolidine compounds
Assignee: OTSUKA KAGAKU YUKUHIN A CORP OF JAPAN KK
•
Filing: 1982-08-09
•
Granted: 1984-11-13
•
Expires: 2002-08-09
Abstract
Abstract This invention provides a process for preparing a thiazolidine compound of the formula ##STR1## wherein R 1 represents a hydrogen atom, alkyl group, aralkyl group, aryl group or aryloxymethyl group, and R 2 represents a hydrogen atom or a group ##STR2## wherein R 3 represents a hydrogen atom, alkyl group, halogenated alkyl group, benzyl group or silyl group, and X represents a hydrogen atom, halogen atom, hydroxy group, alkoxy group or acyloxy group, the process comprising electrolyzing a thiazoline compound represented by the formula ##STR3## wherein R 1 and R 2 are as defined above, in a mixture comprising a perchloric acid aqueous solution and an organic solvent.
Inventors
- 👤 Sigeru Torii
- 👤 Hideo Tanaka
- 👤 Takashi Shiroi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:47
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/02; C07D513/04; C25; C25B; C25B3/00; C25B3/01; C25B3/05; C25B3/07; C25B3/09; C25B3/11; C25B3/20; C25B3/25
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
104 words
A process for preparing a thiazolidine compound represented by the formula ##STR11## wherein R 1 represents a hydrogen atom, alkyl group, aralkyl group, aryl group or aryloxymethyl, R 2 represents a hydrogen atom or a group ##STR12## wherein R 3 represents a hydrogen atom, alkyl group, halogenated alkyl group, benzyl group or silyl group, and X represents a hydrogen atom, halogen atom, hydroxy group, alkoxy group or acyloxy group, the process comprising electrolyzing a thiazoline compound represented by the formula ##STR13## wherein R 1 and R 2 are as defined above, in a mixture comprising a perchloric acid aqueous solution and an organic solvent.
Claim 2
Dependent Claim
104 words
A process for preparing a thiazolidine compound represented by the formula ##STR11## wherein R 1 represents a hydrogen atom, alkyl group, aralkyl group, aryl group or aryloxymethyl, R 2 represents a hydrogen atom or a group ##STR12## wherein R 3 represents a hydrogen atom, alkyl group, halogenated alkyl group, benzyl group or silyl group, and X represents a hydrogen atom, halogen atom, hydroxy group, alkoxy group or acyloxy group, the process comprising electrolyzing a thiazoline compound represented by the formula ##STR13## wherein R 1 and R 2 are as defined above, in a mixture comprising a perchloric acid aqueous solution and an organic solvent.
Claim 3
Dependent Claim
22 words
A process defined in claim 1 in which the organic solvent is a halogenated hydrocarbon, hydrocarbon, ether, ester or a mixture thereof.
Claim 4
Dependent Claim
16 words
A process as defined in claim 1 in which the organic solvent is a halogenated hydrocarbon.
Claim 5
Dependent Claim
37 words
A process as defined in claim 1 in which the organic solvent is used in an amount of about 1 to about 10,000 parts by weight, per part by weight of the compound of the formula (II).
Claim 6
Dependent Claim
37 words
A process as defined in claim 1 in which the organic solvent is used in an amount of about 10 to about 1,000 parts by weight per part by weight of the compound of the formula (II).
Claim 7
Dependent Claim
26 words
A process as defined in claim 1 in which the perchloric acid aqueous solution is used in a concentration of about 0.1 to about 6 moles/l.
Claim 8
Dependent Claim
36 words
A process as defined in claim 1 in which the perchloric acid aqueous solution is used in an amount of about 1 to 10,000 parts by volume per 100 parts by volume of the organic solvent.
Claim 9
Dependent Claim
37 words
A process as defined in claim 1 in which the perchloric acid aqueous solution is used in an amount of about 5 to about 2,000 parts by volume, per 100 parts by volume of the organic solvent.
Claim 10
Dependent Claim
19 words
A process as defined in claim 1 in which the electrolysis is carried out in an undivided electrolytic bath.
Claim 11
Dependent Claim
21 words
A process as defined in claim 1 in which an electrode of lead or lead dioxide is used as a cathode.
Claim 12
Dependent Claim
23 words
A process as defined in claim 1 in which the electrolysis is conducted at a temperature of about -10° to about 80° C.
Claim 13
Dependent Claim
23 words
A process as defined in claim 1 in which the electrolysis is conducted at a temperature of about 0° to about 50° C.
Claim 14
Dependent Claim
26 words
A process as defined in claim 1 in which the electrolysis is conducted while alternating the current direction at intervals of 1 second to 30 minutes.
Claim 15
Dependent Claim
27 words
A process as defined in claim 1 in which the electrolysis was carried out at a current density of about 1 to about 300 mA/cm 2 .
Claim 16
Dependent Claim
26 words
A process as defined in claim 1 in which the electrolysis was performed at a current density of about 10 to about 200 mA/cm 2 .
Claim 17
Dependent Claim
30 words
A process as defined in claim 1 in which an electric charge of about 4 to about 20 F per mole of the compound of the formula (II) is passed.
References Cited (Backward Citations)
GB1368232A
Cited
JPS5729588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |