Patent US4396785A successfully refreshed from Google Patents.
US4396785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3,3,3-Trifluoropropyl derivatives of naphthalene or methylnaphthalene and process for preparing the same
Assignee: Kureha Corp
•
Filing: 1981-08-07
•
Granted: 1983-08-02
•
Expires: 2001-08-07
Abstract
Abstract Novel 3,3,3-trifluoropropyl derivatives of naphthalene or methylnaphthalene of the general formula ##STR1## wherein R 1 and R 2 respectively represent hydrogen atom or methyl group, with the proviso that R 1 and R 2 do not simultaneously represent methyl group; m and n respectively represent zero or 1, with the proviso that the sum of m and n is 1, and a process for preparing the derivatives are disclosed. The derivatives are suitable as a dielectric material.
Inventors
- 👤 Yoshiro Kobayashi
- 👤 Itsumaro Kumadaki
- 👤 Masaaki Takahashi
- 👤 Takashi Yamauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:32
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; H01G4/222; C; C07; C07C; C07C17/00; C07C17/26; C07C17/32; C07C22/00; C07C22/02; C07C22/04; C07C22/08; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/24
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
55 words
A naphthalene derivative of the formula: ##STR4## wherein R 1 and R 2 respectively represent hydrogen atom or methyl group, with the proviso that R 1 and R 2 do not simultaneously represent methyl group; m and n respectively represent zero or 1, with the proviso that the sum of m and n is 1.
Claim 2
Dependent Claim
55 words
A naphthalene derivative of the formula: ##STR4## wherein R 1 and R 2 respectively represent hydrogen atom or methyl group, with the proviso that R 1 and R 2 do not simultaneously represent methyl group; m and n respectively represent zero or 1, with the proviso that the sum of m and n is 1.
Claim 3
Dependent Claim
1 words
(3,3,3-Trifluoropropyl)naphthalene.
Claim 4
Dependent Claim
1 words
(3,3,3-Trifluoropropyl)naphthalene.
Claim 5
Dependent Claim
1 words
1-Methyl-(3,3,3-trifluoropropyl)naphthalene.
Claim 6
Dependent Claim
1 words
1-Methyl-(3,3,3-trifluoropropyl)naphthalene.
Claim 7
Dependent Claim
1 words
2-Methyl-(3,3,3-trifluoropropyl)naphthalene.
Claim 8
Dependent Claim
1 words
2-Methyl-(3,3,3-trifluoropropyl)naphthalene.
Claim 9
Dependent Claim
49 words
A process for preparing 3,3,3-trifluoropropyl derivative of an aromatic compound selected from the group consisting of naphthalene, 1-methylnaphthalene and 2-methylnaphthalene, said process comprising bringing said aromatic compound into reaction with 3,3,3-trifluoropropene in the presence of an acid catalyst selected from the group consisting of hydrogen fluoride and boron trifluoride.
Claim 10
Dependent Claim
49 words
A process for preparing 3,3,3-trifluoropropyl derivative of an aromatic compound selected from the group consisting of naphthalene, 1-methylnaphthalene and 2-methylnaphthalene, said process comprising bringing said aromatic compound into reaction with 3,3,3-trifluoropropene in the presence of an acid catalyst selected from the group consisting of hydrogen fluoride and boron trifluoride.
Claim 11
Dependent Claim
35 words
The process according to claim 5, wherein the aromatic compound is brought into reaction with 3,3,3-trifluoropropene in the presence of boron trifluoride at a temperature of -20° to 100° C. for 0.5 to 30 hours.
Claim 12
Dependent Claim
35 words
The process according to claim 5, wherein the aromatic compound is brought into reaction with 3,3,3-trifluoropropene in the presence of hydrogen fluoride at a temperature of 0° to 120° C. for 0.5 to 30 hours.
Claim 13
Dependent Claim
63 words
A dielectric material comprising at least one of 3,3,3-trifluoropropyl aromatic compound of the formula ##STR5## wherein R 1 and R 2 respectively represent hydrogen atom or methyl group, with the proviso that R 1 and R 2 do not simultaneously represent methyl group; m and n respectively represent zero or 1, with the proviso that the sum of m and n is 1.
Claim 14
Dependent Claim
63 words
A dielectric material comprising at least one of 3,3,3-trifluoropropyl aromatic compound of the formula ##STR5## wherein R 1 and R 2 respectively represent hydrogen atom or methyl group, with the proviso that R 1 and R 2 do not simultaneously represent methyl group; m and n respectively represent zero or 1, with the proviso that the sum of m and n is 1.
Claim 15
Dependent Claim
42 words
A mono-substituted naphthalene by 3,3,3-trifluoropropyl group obtained by bringing naphthalene into reaction with 3,3,3-trifluoropropene in the presence of an acid catalyst selected from the group consisting of hydrogen fluoride and boron trifluoride, and separating said mono-substituted naphthalene from the resultant reaction mixture.
Claim 16
Dependent Claim
42 words
A mono-substituted naphthalene by 3,3,3-trifluoropropyl group obtained by bringing naphthalene into reaction with 3,3,3-trifluoropropene in the presence of an acid catalyst selected from the group consisting of hydrogen fluoride and boron trifluoride, and separating said mono-substituted naphthalene from the resultant reaction mixture.
Claim 17
Dependent Claim
42 words
A mono-substituted 1-methylnaphthalene by 3,3,3-trifluoropropyl group obtained by bringing 1-methylnaphthalene into reaction with 3,3,3-trifluoropropene in the presence of an acid catalyst selected from the group consisting of hydrogen fluoride and boron trifluoride, and separating said mono-substituted 1-methylnaphthalene from the resultant reaction mixture.
Claim 18
Dependent Claim
42 words
A mono-substituted 1-methylnaphthalene by 3,3,3-trifluoropropyl group obtained by bringing 1-methylnaphthalene into reaction with 3,3,3-trifluoropropene in the presence of an acid catalyst selected from the group consisting of hydrogen fluoride and boron trifluoride, and separating said mono-substituted 1-methylnaphthalene from the resultant reaction mixture.
Claim 19
Dependent Claim
42 words
A mono-substituted 2-methylnaphthalene by 3,3,3-trifluoropropyl group obtained by bringing 2-methylnaphthalene into reaction with 3,3,3-trifluoropropene in the presence of an acid catalyst selected from the group consisting of hydrogen fluoride and boron trifluoride, and separating said mono-substituted 2-methylnaphthalene from the resultant reaction mixture.
Claim 20
Dependent Claim
42 words
A mono-substituted 2-methylnaphthalene by 3,3,3-trifluoropropyl group obtained by bringing 2-methylnaphthalene into reaction with 3,3,3-trifluoropropene in the presence of an acid catalyst selected from the group consisting of hydrogen fluoride and boron trifluoride, and separating said mono-substituted 2-methylnaphthalene from the resultant reaction mixture.
References Cited (Backward Citations)
US2561738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |