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US4001276A
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α-Alkyl(or aryl)thio-5-hydroxytryptophan derivative and the preparation process thereof
Assignee: Sagami Chemical Research Institute
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Filing: 1974-02-26
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Granted: 1977-01-04
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Expires: 1994-02-26
Abstract
Abstract As a novel compound, an α-alkyl(or aryl)thio-5-hydroxytryptophan derivative and the preparation process thereof are disclosed. Said novel compound is readily convertible to 5-hydroxytryptophan having a versatile utilization.
Inventors
- 👤 Genichi Tsuchihashi
- 👤 Katsuyuki Ogura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18; C07D209/20; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
34 words
A thio-5-hydroxytryptophan derivative expressed by the following formula ##SPC5## wherein R is alkyl having 1 to 3 carbon atoms, Y is acetyl, trifluoroacetyl, benzyloxycarbonyl or p-toluenesulfonyl and Z is methyl, benzyl, benzoyl or acetyl.
Claim 2
Dependent Claim
34 words
A thio-5-hydroxytryptophan derivative expressed by the following formula ##SPC5## wherein R is alkyl having 1 to 3 carbon atoms, Y is acetyl, trifluoroacetyl, benzyloxycarbonyl or p-toluenesulfonyl and Z is methyl, benzyl, benzoyl or acetyl.
Claim 3
Dependent Claim
12 words
The compound of claim 1 in which R is a methyl group.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |