US3873516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of 1-{8 {62 -D-2-substituted-2-deoxyribofuranosyl{9 -pyrimidines
Assignee: Bayer Corp
•
Filing: 1973-05-29
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Granted: 1975-03-25
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Expires: 1993-05-29
Abstract
Abstract The synthesis of 1-( Beta -D-2''-halogeno-2''-deoxyribofuranosyl)- and 1-( Beta -D-2''-mercapto-2''-deoxyribofuranosyl)pyrimidine derivatives from corresponding 2,2''-anhydro-1-( Beta D-arabinofuranosyl)-pyrimidine precursors is improved by utilization of N,N-dimethylformamide as the reaction solvent.
Inventors
- 👤 Michael Paul Kotick
- 👤 Joseph Odo Polazzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:35
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
10 words
AN IMPROVED METHOD FOR PREPARING A 1-(B-D-2''SUBSTITUTED-2''-DEOXYRIBOFURANOSYL)-PYRIMIDINE HAVING THE FORMULA
Claim 2
Dependent Claim
10 words
AN IMPROVED METHOD FOR PREPARING A 1-(B-D-2''SUBSTITUTED-2''-DEOXYRIBOFURANOSYL)-PYRIMIDINE HAVING THE FORMULA
Claim 3
Dependent Claim
22 words
A method as in claim 1, wherein said first reactant is 2, 2''-anhydro-1-( Beta -D-arabinofuranosyl)-uracil and said second reactant is hydrogen sulfide.
Claim 4
Dependent Claim
22 words
A method as in claim 1, wherein said first reactant is 2, 2''-anhydro-1-( Beta -D-arabinofuranosyl)-thymine and said second reactant is hydrogen sulfide.
Claim 5
Dependent Claim
21 words
A method as in claim 1, wherein said first reactant is 2,2''-anhydro-1-( Beta -D-arabinofuranosyl)-cytosine and said second reactant is hydrogen sulfide.
References Cited (Backward Citations)
US3463850A
Cited
US3775397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |