US4298737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piperdinyl substituted 1,4-diaza-2-cycloalkanones and derivatives thereof
Assignee: Goodrich Corp
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Filing: 1979-10-22
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Granted: 1981-11-03
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Expires: 1999-10-22
Abstract
Abstract Improved process for the synthesis of piperidinyl substituted 1,4-diaza-2-cycloalkanones and substituted derivatives thereof, involving solid-liquid phase transfer phenomena. More specifically, the subject compounds are prepared by combining a piperidinyl substituted diamine and a suitable coreactant in the presence of a phase transfer catalyst and caustic. Compounds prepared in this fashion are suitable as UV stabilizers for photodegradable plastics.
Inventors
- 👤 John T. Lai
- 👤 Pyong-Nae Son
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:19
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/02; C07D241/06; C07D241/08; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3462
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
Compounds of the formula: ##STR5## wherein R 1 through R 4 can be hydrogen or alkyl of 1 to 10 carbon atoms; R 5 and R 6 are independently selected from the group consisting of alkyl of 1 to 12 carbon atoms, cycloalkyl, hydroxycycloalkyl, aminoalkyl, iminoalkyl, alkenyl, aralkyl and alkylene, provided further that any two of said substituents pendant from the same carbon atom can collectively form a cyclic or alicyclic hydrocarbon; R 7 and R 8 are selected from the same group of substituents as R 5 and R 6 above; R 9 and R 10 is oxygen, hydrogen or alkyl of 1 to 12 carbon atoms; and n is 1 to 3.
Claim 2
Dependent Claim
114 words
Compounds of the formula: ##STR5## wherein R 1 through R 4 can be hydrogen or alkyl of 1 to 10 carbon atoms; R 5 and R 6 are independently selected from the group consisting of alkyl of 1 to 12 carbon atoms, cycloalkyl, hydroxycycloalkyl, aminoalkyl, iminoalkyl, alkenyl, aralkyl and alkylene, provided further that any two of said substituents pendant from the same carbon atom can collectively form a cyclic or alicyclic hydrocarbon; R 7 and R 8 are selected from the same group of substituents as R 5 and R 6 above; R 9 and R 10 is oxygen, hydrogen or alkyl of 1 to 12 carbon atoms; and n is 1 to 3.
Claim 3
Dependent Claim
6 words
The compound of claim 1, 1-[4-(1-oxo-2,2,6,6-tetramethyl-piperidine)]-3,3-pentamethylene-5,5-dimethyl-4-oxo-piperazin-2-one.
Claim 4
Dependent Claim
6 words
The compound of claim 1, 1-[4-(2,2,6,6-tetramethyl-piperidine)]-3,3-pentamethylene-5,5-dimethylpiperazine-2-one.
Claim 5
Dependent Claim
7 words
The compound of claim 1, 1-[4-(2,2,6,6-tetramethyl piperidine)]-3,5,5-trimethyl-3-hexyl-piperazine-2one.
Claim 6
Dependent Claim
8 words
The compound of claim 1, 1-[4-(1,2,2,6,6-pentamethyl piperidine)]-3,3-pentamethylene-4,5,5-trimethyl piperazine-2-one.
Claim 7
Dependent Claim
6 words
The compound of claim 1, 1-[4-(2,2,6,6-tetramethyl-piperidine)]-3,3,5,5-tetramethyl-piperazine-2-one.
References Cited (Backward Citations)
US3311624A
Cited
US4190571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |