US4417064A
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Biphenyl compounds and method of preparing same
Assignee: Polaroid Corp
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Filing: 1981-10-22
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Granted: 1983-11-22
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Expires: 2001-10-22
Abstract
Abstract The present invention relates to novel biphenyl compounds of the formula ##STR1## wherein one of R 1 and R 2 is hydrogen and the other is --CH 3-m X m wherein X is chloro or bromo and m is an integer one or two, and the cyclic moiety A is a -2,5-; -2,3-; or -3,4-di-OR-1-phenyl moiety wherein R is a hydroxy-protecting group and to a method of preparing same. The biphenyl compounds are useful as intermediates in preparing redox compounds containing a phenylhydroquinone or phenylcatechol moiety.
Inventors
- 👤 Avinash C. Mehta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:46
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; C; C07; C07C; C07C43/00; C07C43/02; C07C43/20; C07C43/225; C07C43/30; C07C43/313; C07C45/00; C07C45/42; C07C45/56; C07C45/562; C07C45/565; C07C47/00; C07C47/52; C07C47/56; C07C47/57; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/18; C07D307/20; C07D309/00; C07D309/02; C07D309/08; C07D309/10; C07D309/12; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/54; C07F9/5456; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
70 words
A compound of the formula ##STR14## wherein one of R 1 and R 2 is hydrogen and the other is CH 3-m X m wherein X is chloro or bromo and m is an integer one or two, and the cyclic moiety A is a -2,5-; -2,3-; or -3,4-di-OR-1-phenyl moiety of the formula ##STR15## wherein R is a hydroxy-protecting group capable of removal so as to regenerate the hydroxy group.
Claim 2
Dependent Claim
70 words
A compound of the formula ##STR14## wherein one of R 1 and R 2 is hydrogen and the other is CH 3-m X m wherein X is chloro or bromo and m is an integer one or two, and the cyclic moiety A is a -2,5-; -2,3-; or -3,4-di-OR-1-phenyl moiety of the formula ##STR15## wherein R is a hydroxy-protecting group capable of removal so as to regenerate the hydroxy group.
Claim 3
Dependent Claim
33 words
A compound of claim 1 wherein said R is selected from the group consisting of lower alkyl having 1 to 6 carbon atoms, methoxymethyl, methylthiomethyl, phenacyl, p-bromophenacyl, 2-tetrahydrofuranyl, 2-tetrahydropyranyl, ethoxycarbonyl, 2,2,2-trichloroethoxycarbonyl, and acyl.
Claim 4
Dependent Claim
17 words
A compound of claim 2 wherein said R is lower alkyl having 1 to 6 carbon atoms.
Claim 5
Dependent Claim
10 words
A compound of claim 3 wherein said R is methyl.
Claim 6
Dependent Claim
12 words
A compound of claim 1 wherein said R is an electron-withdrawing group.
Claim 7
Dependent Claim
19 words
A compound of claim 5 wherein said R is selected from the group consisting of acyl, ethoxycarbonyl, and 2,2,2-trichloroethoxycarbonyl.
Claim 8
Dependent Claim
10 words
A compound of claim 6 wherein said R is acyl.
Claim 9
Dependent Claim
10 words
A compound of claim 7 wherein said R is acetyl.
Claim 10
Dependent Claim
9 words
A compound of claim 1 wherein X is bromo.
Claim 11
Dependent Claim
9 words
A compound of claim 1 wherein m is one.
Claim 12
Dependent Claim
9 words
A compound of claim 1 wherein m is two.
Claim 13
Dependent Claim
35 words
A compound of the formula ##STR16## wherein X is chloro or bromo, R is a hydrogen-protecting group capable of removal so as to regenerate the hydroxy group, and m is an integer one or two.
Claim 14
Dependent Claim
35 words
A compound of the formula ##STR16## wherein X is chloro or bromo, R is a hydrogen-protecting group capable of removal so as to regenerate the hydroxy group, and m is an integer one or two.
Claim 15
Dependent Claim
9 words
A compound of claim 12 wherein X is bromo.
Claim 16
Dependent Claim
14 words
A compound of the formula ##STR17## wherein m is an integer one or two.
Claim 17
Dependent Claim
14 words
A compound of the formula ##STR17## wherein m is an integer one or two.
Claim 18
Dependent Claim
14 words
A compound of the formula ##STR18## wherein m is an integer one or two.
Claim 19
Dependent Claim
14 words
A compound of the formula ##STR18## wherein m is an integer one or two.
Claim 20
Dependent Claim
9 words
A compound of claim 15 wherein m is one.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |