US3852305A
Expired / Lapsed
US
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Isomerization of alkenyl-alkoxybenzenes
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1971-11-16
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Granted: 1974-12-03
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Expires: 1991-11-16
Abstract
Abstract A method of isomerization of alkenyl-alkoxybenzenes which comprises contacting an alkenyl-alkoxybenzene of the formula: WHEREIN M IS AN INTEGER OF 1 TO 5, R is lower alkyl or, when m is two or more and at least two of R are adjacent, the adjacent two R may represent lower alkylene including methylene and R'' is an alkenyl group having a double bond at the position not conjugated with the benzene ring with a catalyst to give the corresponding alkenyl-alkoxybenzene wherein the double bond in the alkenyl group represented by R'' is migrated to the position conjugated with the benzene ring, the said catalyst being the one prepared by heating an alkali metal, an alkali metal hydroxide and alumina at a temperature higher than the melting point of the alkali metal.
Inventors
- 👤 T Nagase
- 👤 G Suzukamo
- 👤 M Fukao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:17
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/02; B01J23/04; C; C07; C07D; C07D317/00; C07D317/08; C07D317/44; C07D317/46; C07D317/48; C07D317/50
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
14 words
A METHOD FOR ISOMERIZATION OF ALKYL-ALKOXYBENZENES WHICH COMPRISES CONTACTING AN ALKENYL-ALKOXYBENZENE OF THE FORMULA
Claim 2
Independent Claim
14 words
A METHOD FOR ISOMERIZATION OF ALKYL-ALKOXYBENZENES WHICH COMPRISES CONTACTING AN ALKENYL-ALKOXYBENZENE OF THE FORMULA
Claim 3
Dependent Claim
30 words
The method according to claim 1, wherein the catalyst is used in an amount of 1/1000 to 1 part by weight to one part by weight of the starting alkenyl-alkoxybenzene.
Claim 4
Dependent Claim
30 words
The method according to claim 1, wherein the catalyst is used in an amount of 1/100 to 1/5 part by weight to one part by weight of the starting alkenyl-alkoxybenzene.
Claim 5
Dependent Claim
14 words
The method according to claim 1, wherein the reaction is effected batchwise or continuously.
Claim 6
Dependent Claim
15 words
The method according to claim 1, wherein the reaction is effected in an inert gas.
Claim 7
Dependent Claim
15 words
The method according to claim 1, wherein the reaction is effected in an inert solvent.
Claim 8
Independent Claim
14 words
A method for isomerization of alkenyl-alkoxybenzenes which comprises contacting an alkenyl-alkoxybenzene of the formula:
Claim 9
Independent Claim
14 words
A method for isomerization of alkenyl-alkoxybenzenes which comprises contacting an alkenyl-alkoxybenzene of the formula:
Claim 10
Independent Claim
14 words
A method for isomerization of alkenyl-alkoxybenzenes which comprises contacting an alkenyl-alkoxybenzene of the formula:
Claim 11
Independent Claim
14 words
A method for isomerization of alkenyl-alkoxybenzenes which comprises contacting an alkenyl-alkoxybenzene of the formula:
Claim 12
Dependent Claim
30 words
The method according to claim 8, wherein the catalyst is used in an amount of 1/1000 to 1 part by weight to one part by weight of the starting alkenyl-alkoxybenzene.
Claim 13
Dependent Claim
30 words
The method according to claim 8, wherein the catalyst is used in an amount of 1/100 to 1/5 part by weight to one part by weight of the starting alkenyl-alkoxybenzene.
Claim 14
Dependent Claim
14 words
The method according to claim 8, wherein the reaction is effected batchwise or continuously.
Claim 15
Dependent Claim
15 words
The method according to claim 8, wherein the reaction is effected in an inert gas.
Claim 16
Dependent Claim
15 words
The method according to claim 8, wherein the reaction is effected in an inert solvent.
Claim 17
Independent Claim
14 words
A method for isomerization of alkenyl-alkoxybenzenes which comprises contacting an alkenyl-alkoxybenzene of the formula:
Claim 18
Independent Claim
14 words
A method for isomerization of alkenyl-alkoxybenzenes which comprises contacting an alkenyl-alkoxybenzene of the formula:
References Cited (Backward Citations)
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US2052744A
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US2516412A
Cited
US2666771A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |