US3699103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of 5-desoxy-l-arabinose and novel intermediates
Assignee: F Hoffmann La Roche AG
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Filing: 1970-10-07
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Granted: 1972-10-17
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Expires: 1990-10-07
Abstract
Abstract A MULTI-STEP, STEREO-SPECIFIC SYNTHESIS OF 5-DESOXY-LARABINOSE FROM THE READILY AVAILABLE AND INEXPENSIVE STARTING MATERIALS D-GLUCOSE OR D-XYLOSE IS DISCLOSED. 5-DESOXYL-ARABINOSE IS A KNOWN BUILDING BLOCK FOR THE MANUFACTURE OF BIPTERIN, A NATURALLY OCCURING MATERIAL HAVING USES AS A GROWTH FACTOR, AND ANTIOXIDANT, AND AS A PRECURSOR FOR CO-FACTORS OF ENZYMES LEADING TO THE PRODUCTION OF VALUABLE AMINO ACIDS SUCH AS PHENYLALANINE, TRYPTOPHAN AND L-DOPA. L-DOPA IS A VALUABLE MEDICAMENT WHICH HAS RECENTLY BEEN LICENSED IN THIS COUNTRY FOR USE IN THE TREATMENT OF PARKINSON''S DISEASE.
Inventors
- 👤 Joseph Kiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:16
CPC Classifications
C; C07; C07H; C07H9/00; C07H9/02; C07H9/04; C07H3/00; C07H3/08
Claims Analysis
Total Claims: 0
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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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |