Patent US4755615A successfully refreshed from Google Patents.
US4755615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of cyclododecenylacetonitrile
Assignee: Huels AG
•
Filing: 1985-01-10
•
Granted: 1988-07-05
•
Expires: 2005-01-10
Abstract
Abstract Cyclododecenylacetonitrile is prepared by reacting cyclododecanone with cyanoacetic acid in the presence of a catalyst. Purified cyclododecenylacetonitrile has a pleasant scent reminiscent of roses and lilies of the valley, containing additionally a musk note, and is suitable as a fragrance and as a fragrance component.
Inventors
- 👤 Manfred Kaufhold
- 👤 Slagmulder Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:41
CPC Classifications
C; C07; C07C; C07C255/00; C11; C11B; C11B9/00; C11B9/0026; C11B9/0038
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
43 words
A process for the production of cyclododecenylacetonitrile which comprises reacting cyclododecanone with cyanoacetic acid in a molar ratio of 5:1 to 1:5 at temperatures of 100°-170° C. in the presence of 5-1% by weight of a Knoevenagel catalyst, and separating the cyclododecenylacetonitrile produced.
Claim 2
Dependent Claim
43 words
A process for the production of cyclododecenylacetonitrile which comprises reacting cyclododecanone with cyanoacetic acid in a molar ratio of 5:1 to 1:5 at temperatures of 100°-170° C. in the presence of 5-1% by weight of a Knoevenagel catalyst, and separating the cyclododecenylacetonitrile produced.
Claim 3
Dependent Claim
19 words
A process according to claim 1, wherein the molar ratio of cyclododecanone is cyanoacetic acid is 1:2 to 1:1.
Claim 4
Dependent Claim
13 words
A process according to claim 1, wherein the reaction temperature is 120°-140° C.
Claim 5
Dependent Claim
12 words
A process according to claim 1, wherein the catalyst is ammonium acetate.
Claim 6
Dependent Claim
15 words
A process according to claim 4, wherein 3-2% by weight of ammonium acetate is present.
Claim 7
Dependent Claim
15 words
A process according to claim 1, wherein the cyclododecenylacetonitrile is separated by distillation under vacuum.
Claim 8
Dependent Claim
18 words
A process according to claim 1, wherein the cyclododecenylacetonitrile is further purified by passing an inert gas therethrough.
Claim 9
Dependent Claim
23 words
A process according to claim 7, wherein the inert gas is passed through the cyclododecenylacetonitrile at 15°-100° C. for 0.5 to 5 hours.
Claim 10
Dependent Claim
20 words
A process according to claim 1, wherein the reaction is carried out over a period of time of 30 hours.
Claim 11
Dependent Claim
24 words
A process according to claim 1, wherein cyclododecanone is reacted with cyanoacetic acid in the presence of toluene for a period of thirty hours.
Claim 12
Dependent Claim
18 words
A process according to claim 1, wherein cyclododecanone and cyanoacetic acid are reacted in the presence of toluene.
Claim 13
Dependent Claim
80 words
A process for the production of cyclododecenylacetonitrile comprising reacting cyclododecanone with cyanoacetic acid in a molar ratio of 1:2 to 1:1 at a temperature of 120°-140° C. in the presence of 3 to 2% by weight of ammonium acetate, acting as a Knoevenagel catalyst, and in the presence of toluene for a period of thirty hours, separating the resultant cyclododecenylacetonitrile by distillation under vacuum, and passing an inert gas through the cyclododecenylacetonitrile at 15°-100° C. for 0.5 to 5 hours.
Claim 14
Dependent Claim
80 words
A process for the production of cyclododecenylacetonitrile comprising reacting cyclododecanone with cyanoacetic acid in a molar ratio of 1:2 to 1:1 at a temperature of 120°-140° C. in the presence of 3 to 2% by weight of ammonium acetate, acting as a Knoevenagel catalyst, and in the presence of toluene for a period of thirty hours, separating the resultant cyclododecenylacetonitrile by distillation under vacuum, and passing an inert gas through the cyclododecenylacetonitrile at 15°-100° C. for 0.5 to 5 hours.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |