US4011145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical manufacture of aromatic esters
Assignee: BASF SE
•
Filing: 1975-06-18
•
Granted: 1977-03-08
•
Expires: 1995-06-18
Abstract
Abstract Electrochemical manufacture of aromatic esters of the naphthalene series by acylation of naphthalene derivatives in an alkanoic acid, wherein the electrolysis is carried out in the presence of a conducing salt of the formula [R.sup.1 R.sup.2 R.sup.3 NH] .sup.+ [OOCR.sup.4 ].sup.- in which R 1 , R.sup. 2 and R 3 denote hydrogen and/or alkyl and R 4 denotes hydrogen or alkyl of from 1 to 6 carbon atoms.
Inventors
- 👤 Juergen Haufe
- 👤 Costin Rentzea
- 👤 Dieter Degner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:28
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/20; C25B3/23; C25B3/01; C25B3/07
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
Electrochemical manufacture of aromatic or heterocyclic esters of the formula ##STR4## in which X denotes hydrogen, chlorine or methyl and R denotes hydrogen, methyl or ethyl by anodic acyloxylation of compounds of the formula ##STR5## in which X has the meaning stated above, with an alkanoic acid of the formula RCOOH, in which R has the meanings stated above, wherein electrolysis is carried out in the presence of from 1 to 20% by weight of a conducting salt of the formula [R.sup.1 R.sup.2 R.sup.3 NH].sup.+ [OOCR].sup.- in which R has the meanings stated above and R 1 , R 2 and R 3 denote alkyl of 1 to 8 carbon atoms, whereby when X is hydrogen, the acyloxylation of naphthalene occurs in the α-position, and whereby said conducting salt is recovered by distillation following the anodic acyloxylation.
Claim 2
Dependent Claim
137 words
Electrochemical manufacture of aromatic or heterocyclic esters of the formula ##STR4## in which X denotes hydrogen, chlorine or methyl and R denotes hydrogen, methyl or ethyl by anodic acyloxylation of compounds of the formula ##STR5## in which X has the meaning stated above, with an alkanoic acid of the formula RCOOH, in which R has the meanings stated above, wherein electrolysis is carried out in the presence of from 1 to 20% by weight of a conducting salt of the formula [R.sup.1 R.sup.2 R.sup.3 NH].sup.+ [OOCR].sup.- in which R has the meanings stated above and R 1 , R 2 and R 3 denote alkyl of 1 to 8 carbon atoms, whereby when X is hydrogen, the acyloxylation of naphthalene occurs in the α-position, and whereby said conducting salt is recovered by distillation following the anodic acyloxylation.
Claim 3
Dependent Claim
27 words
A process as set forth in claim 1, wherein the conducting salts used are trimethylammonium formate, trimethylammonium acetate, trimethylammonium propionate, triethylammonium formate, triethylammonium acetate or triethylammonium propionate.
Claim 4
Dependent Claim
18 words
A process as set forth in claim 1, wherein the aromatic compound used is naphthalene, 2-methylnaphthalene or 1-chloronaphthalene.
Claim 5
Dependent Claim
21 words
A process as set forth in claim 1, wherein the alkanoic acid used is formic acid, acetic acid or propionic acid.
References Cited (Backward Citations)
GB1021908A
Cited
US3652430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |