US4180679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel substituted dinitrotoluenes and methods for preparing the same
Assignee: Wyeth Holdings LLC
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Filing: 1978-08-22
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Granted: 1979-12-25
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Expires: 1998-08-22
Abstract
Abstract There are provided substituted dinitrotoluenes and methods of preparation thereof, said dinitrotoluenes being useful as intermediates for the preparation of certain herbicidal 2,6-dinitroanilines.
Inventors
- 👤 Inder P. Kapoor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:56
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/27; C07C205/35; A; A01; A01N; A01N33/00; A01N33/16; A01N33/18; C07C205/07; C07C205/11; C07C205/12; C07C205/13; C07C205/26; C07C205/34; C07C205/49; C07C205/57; C07C205/58
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
50 words
A compound of the formula: ##STR18## wherein X is halogen; R 1 is a member selected from the group consisting of bromine and OR 2 ; R 2 is a member selected from the group consisting of alkyl C 1 -C 4 , hydroxyalkyl C 1 -C 4 and phenyl.
Claim 2
Dependent Claim
50 words
A compound of the formula: ##STR18## wherein X is halogen; R 1 is a member selected from the group consisting of bromine and OR 2 ; R 2 is a member selected from the group consisting of alkyl C 1 -C 4 , hydroxyalkyl C 1 -C 4 and phenyl.
Claim 3
Dependent Claim
42 words
The compound according to claim 1, wherein X is chlorine; R 1 is selected from bromine and OR 2 ; R 2 is selected from the group consisting of CH 3 , C 2 H 5 and C 2 H 4 OH.
Claim 4
Dependent Claim
7 words
The compound according to claim 1, α'-bromo-4-chloro-3,5-dinitro-o-xylene.
Claim 5
Dependent Claim
9 words
The compound according to claim 1, 4-chloro-2-methyl-3,5-dinitrobenzyl methyl ether.
Claim 6
Dependent Claim
9 words
The compound according to claim 1, 4-chloro-2-methyl-3,5-dinitrobenzyl ethyl ether.
Claim 7
Dependent Claim
7 words
The compound according to claim 1, 2-(4-chloro-2-methyl-3,5-dinitrobenzyloxy)ethanol.
Claim 8
Dependent Claim
65 words
The process for preparing the compound according to claim 1 which comprises: reacting a mixture of concentrated nitric acid and sulfuric acid with 4-chloro-o-toluic acid at a temperature from about 40° C. to about 60° C., reducing resultant 4-chloro-3,5-dinitro-o-toluic acid with diborane, treating resultant 4-chloro-3,5-dinitro-benzyl alcohol with phosphorus tribromide to obtain α'-bromo-4-chloro-3,5-dinitro-o-xylene, reacting the latter with an aliphatic alcohol, and recovering the resultant desired compound.
Claim 9
Dependent Claim
12 words
The process according to claim 7 wherein the aliphatic alcohol is methanol.
Claim 10
Dependent Claim
12 words
The process according to claim 8 wherein the aliphatic alcohol is ethanol.
Claim 11
Dependent Claim
12 words
The process according to claim 9 wherein the alcohol is diethylene glycol.
References Cited (Backward Citations)
US2587566A
Cited
US2768217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |