US3852290A
Expired / Lapsed
US
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Thiocarbonates
Assignee: Nitto Boseki Co Ltd
•
Filing: 1972-09-08
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Granted: 1974-12-03
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Expires: 1992-09-08
Abstract
Abstract Thiolcarbonates represented by the formula, The thiolcarbonates can be easily produced by reacting an alkali metal salt of 2-mercaptopyrimidine with phosgene, and reacting the resulting thiolchloroformate with an alcohol (R3OH), or by reacting a 2-mercaptopyrimidine with a halo-carbonic acid ester. WHEREIN R1 and R2 are individually a hydrogen atom or a methyl group, and R3 is a straight chain or branched chain saturated or unsaturated alkyl group having 1 to 5 carbon atoms or is a benzyl or benzhydryl group which may be nuclear substituted, are quite useful for protecting the amino or imino groups of amines, hydrazines, amino acids and peptides with groups of the formula D R A W I N G
Inventors
- 👤 K Narita
- 👤 T Nagasawa
- 👤 K Kuroiwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:19
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/32; C07D239/38; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/16; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18; C07D209/20; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
6 words
A THIOLCARBONATE REPRESENTED BY THE FORMULA,
Claim 2
Dependent Claim
6 words
A THIOLCARBONATE REPRESENTED BY THE FORMULA,
Claim 3
Dependent Claim
11 words
t-Butyl pyrimidyl-2-thiolcarbonate, or t-butyl 4-methyl- or 4,6-dimethyl-pyrimidyl-2-thiolcarbonate, in accordance with claim
Claim 4
Dependent Claim
12 words
t-Amyl pyrimidyl-2-thiolcarbonate, or t-amyl 4-methyl- or 4, 6-dimethyl-pyrimidyl-2-thiolcarbonate, in accordance with claim
Claim 5
Dependent Claim
12 words
Benzyl pyrimidyl-2-thiolcarbonate, or benzyl 4-methyl- or 4, 6-dimethyl-pyrimidyl-2-thiolcarbonate, in accordance with claim
Claim 6
Dependent Claim
12 words
p-Methoxybenzyl pyrimidyl-2-thiolcarbonate, or p-methoxybenzyl 4-methyl- or 4,6-dimethyl-pyrimidyl-2-thiolcarbonate, in accordance with claim 1.
Claim 7
Dependent Claim
12 words
2,4-Dimethoxybenzyl pyrimidyl-2-thiolcarbonate, or 2,4-dimethoxybenzyl 4-methyl- or 4,6-dimethyl-pyrimidyl-2-thiolcarbonate, in accordance with claim 1.
Claim 8
Dependent Claim
11 words
2,4,6-Trimethoxybenzyl pyrimidyl-2-thiolcarbonate, or 2,4,6-trimethoxybenzyl-4-methyl- or 4,6-dimethyl-pyrimidyl-2-thiolcarbonate, iN accordance with claim 1.
Claim 9
Dependent Claim
12 words
p-Nitrobenzyl pyrimidyl-2-thiolcarbonate, or p-nitrobenzyl 4-methyl- or 4,6-dimethyl-pyrimidyl-2-thiolcarbonate, in accordance with claim 1.
Claim 10
Dependent Claim
12 words
p-Chlorobenzyl pyrimidyl-2-thiolcarbonate, or p-chlorobenzyl 4-methyl- or 4,6-dimethyl-pyrimidyl-2-thiolcarbonate, in accordance with claim 1.
Claim 11
Dependent Claim
12 words
p-Bromobenzyl pyrimidyl-2-thiolcarbonate, or p-bromobenzyl 4-methyl- or 4,6-dimethyl-pyrimidyl-2-thiolcarbonate, in accordance with claim 1.
Claim 12
Dependent Claim
11 words
Benzhydryl-pyrimidyl-2-thiolcarbonate, or benzhydryl 4-methyl- or 4,6-dimethyl-pyrimidyl-2-thiolcarbonate, in accordance with claim 1.
References Cited (Backward Citations)
FR1368623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |