US4055716A
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N4 Acyl-1-arabinofuranosylcytosine-5'-esters
Assignee: Asahi Kasei Corp
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Filing: 1976-04-08
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Granted: 1977-10-25
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Expires: 1996-04-08
Abstract
Abstract N 4 -Acyl-1-β-D-arabinofuranosylcytosine-5'-esters represented by the formula ##STR1## wherein R 1 represents an acyl group having 3 to 28 carbon atoms and R 2 represents an XCH 2 , XCH 2 CH 2 or CH 3 CHX group, wherein X represents a halogen atom, a (CH 3 ) 2 N or (C 2 H 5 ) 2 N group.
Inventors
- 👤 Torao Ishida
- 👤 Takashi Shirai
- 👤 Minoru Akiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:36
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
57 words
A nucleoside derivative represented by the formula: ##STR4##wherein R 1 represents an acyl group having 3 to 28 carbon atoms and R 2 represents an XCH 2 -, XCH 2 CH 2 -- or CH 3 CHX-group, wherein X represents chloro, bromo, a (CH 3 ) 2 N-group or a (C 2 H 5 ) 2 N-group.
Claim 2
Dependent Claim
57 words
A nucleoside derivative represented by the formula: ##STR4##wherein R 1 represents an acyl group having 3 to 28 carbon atoms and R 2 represents an XCH 2 -, XCH 2 CH 2 -- or CH 3 CHX-group, wherein X represents chloro, bromo, a (CH 3 ) 2 N-group or a (C 2 H 5 ) 2 N-group.
Claim 3
Dependent Claim
57 words
A nucleoside derivative represented by the formula: ##STR5##wherein R 1 represents an acyl group having 14 to 22 carbon atoms and R 2 represents an XCH 2 --, XCH 2 CH 2 -- or CH 3 CHX-group, wherein X represents chloro, bromo, a (CH 3 ) 2 N-group or a (C 2 H 5 ) 2 N-group.
Claim 4
Dependent Claim
57 words
A nucleoside derivative represented by the formula: ##STR5##wherein R 1 represents an acyl group having 14 to 22 carbon atoms and R 2 represents an XCH 2 --, XCH 2 CH 2 -- or CH 3 CHX-group, wherein X represents chloro, bromo, a (CH 3 ) 2 N-group or a (C 2 H 5 ) 2 N-group.
Claim 5
Dependent Claim
23 words
The nucleoside derivative as claimed in claim 2, wherein said acyl group is myristoyl, tetradecenoyl, pentadecanoyl, palmitoyl, margaroyl, stearoyl, nonadecanoyl, arachiodoyl or behenoyl.
Claim 6
Dependent Claim
27 words
The nucleoside derivative as claimed in claim 1, wherein said X represents a (CH 3 ) 2 N-group or a (C 2 H 5 ) 2 N-group.
Claim 7
Dependent Claim
23 words
The nucleoside derivative as claimed in claim 4, wherein said acyl group is myristoyl, tetradecenoyl pentadecanoyl, palmitoyl, margaroyl, stearoyl, nonadecanoyl, arachiodoyl or behenoyl.
References Cited (Backward Citations)
US3457253A
Cited
US3847898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |