US4239893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dihydropyridine derivatives
Assignee: Sanofi SA
•
Filing: 1979-11-20
•
Granted: 1980-12-16
•
Expires: 1999-11-20
Abstract
Abstract The instant invention relates to compounds of the general formula: <IMAGE> wherein R1 represents an alkyl, alkenyl, phenylalkyl radical, R2 represents a straight-chain alkyl, a straight- or branched-chain alkenyl or alkynyl radical, a omega -halogenoethyl radical, an optionally substituted benzyl radical, or a radical of the formula R4-O-(CH2)n-wherein n is 2, 3 or 4 and R4 represents a substituted alkyl radical. The compounds of the foregoing formula have been found to be useful as stabilizers for vinyl resins.
Inventors
- 👤 Charles Pigerol
- 👤 Marie-Madeleine Chandavoine
- 👤 Paul de C. de Fillain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:05
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C07; C07D; C07D211/00; C07D211/04; C07D211/80; C07D211/84; C07D211/90
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
173 words
A compound of the general formula: ##STR7## wherein R 1 represents a branched- or straight-chain alkyl group containing from 1 to 16 carbon atoms, a branched- or straight-chain alkenyl group containing from 4 to 12 carbon atoms, a straight-chain phenylalkyl radical in which the alkyl chain contains from 1 to 6 carbon atoms, R 2 represents a straight-chain alkyl group containing from 1 to 18 carbon atoms, a branched- or straight-chain alkenyl or alkynyl group containing from 3 to 11 carbon atoms, an ω-halogenoethyl radical, a benzyl radical substituted on the para- or ortho-position by a halogen atom or a methyl or methoxy radical, or a radical of the formula R 4 --O--(CH 2 ) n --, wherein n is 2, 3 or 4 and R 4 represents a branched- or straight-chain alkyl group containing from 1 to 4 carbon atoms, substituted on the ω-position by a halogen atom or by a methoxy radical, with the proviso that when R 1 represents a methyl radical, R 2 does not represent an alkyl radical.
Claim 2
Dependent Claim
173 words
A compound of the general formula: ##STR7## wherein R 1 represents a branched- or straight-chain alkyl group containing from 1 to 16 carbon atoms, a branched- or straight-chain alkenyl group containing from 4 to 12 carbon atoms, a straight-chain phenylalkyl radical in which the alkyl chain contains from 1 to 6 carbon atoms, R 2 represents a straight-chain alkyl group containing from 1 to 18 carbon atoms, a branched- or straight-chain alkenyl or alkynyl group containing from 3 to 11 carbon atoms, an ω-halogenoethyl radical, a benzyl radical substituted on the para- or ortho-position by a halogen atom or a methyl or methoxy radical, or a radical of the formula R 4 --O--(CH 2 ) n --, wherein n is 2, 3 or 4 and R 4 represents a branched- or straight-chain alkyl group containing from 1 to 4 carbon atoms, substituted on the ω-position by a halogen atom or by a methoxy radical, with the proviso that when R 1 represents a methyl radical, R 2 does not represent an alkyl radical.
Claim 3
Dependent Claim
16 words
A compound according to claim 1 wherein R 1 is methyl and R 2 is allyl.
Claim 4
Dependent Claim
16 words
A compound according to claim 1 wherein R 1 is methyl and R 2 is propargyl.
Claim 5
Dependent Claim
16 words
A compound according to claim 1 wherein R 1 is methyl and R 2 is chloroethyl.
Claim 6
Dependent Claim
16 words
A compound according to claim 1 wherein R 1 is methyl and R 2 is 4-methoxybenzyl.
Claim 7
Dependent Claim
16 words
A compound according to claim 1 wherein R 1 is methyl and R 2 is 2-chlorobenzyl.
Claim 8
Dependent Claim
16 words
A compound according to claim 1 wherein R 1 is methyl and R 2 is 2-methylbenzyl.
Claim 9
Dependent Claim
16 words
A compound according to claim 1 wherein R 1 is methyl and R 2 is 4-chlorobenzyl.
Claim 10
Dependent Claim
16 words
A compound according to claim 1 wherein R 1 is benzyl and R 2 is ethyl.
Claim 11
Dependent Claim
16 words
A compound according to claim 1 wherein R 1 is 3-butenyl and R 2 is methyl.
Claim 12
Dependent Claim
16 words
A compound according to claim 1 wherein R 1 is tridecyl and R 2 is methyl.
Claim 13
Dependent Claim
16 words
A compound according to claim 1 wherein R 1 is methyl and R 2 is 2-(2-chloroethoxy)ethyl.
References Cited (Backward Citations)
US3511847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |