Patent US4125563A successfully refreshed from Google Patents.
US4125563A
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Process for making nitroarylacetylenes and nitroarylaldehydes
Assignee: Raytheon Co
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Filing: 1977-08-26
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Granted: 1978-11-14
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Expires: 1997-08-26
Abstract
Abstract I have discovered a process for making nitroarylacetylenes and aminoarylacetylenes in which the aryl radical is a phenylene radical or a diphenylene radical. With the exception of p-aminophenylacetylene, the compounds produced by this process are novel. The compounds are all useful as intermediates in the preparation of addition polymers utilizing a polymeric backbone of polyimides. The addition polymers are useful as adhesives and as laminating resins.
Inventors
- 👤 Robert H. Boschan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:54
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/06; C07C201/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
37 words
A process for making a compound of the following formula: O.sub.2 N--R--C≡H which comprises reacting in alkaline-dioxane solution a compound of the formula: ##STR3## R being ##STR4## and X is hydrogen, methyl, phenyl, methoxy, fluoro or chloro.
Claim 2
Dependent Claim
37 words
A process for making a compound of the following formula: O.sub.2 N--R--C≡H which comprises reacting in alkaline-dioxane solution a compound of the formula: ##STR3## R being ##STR4## and X is hydrogen, methyl, phenyl, methoxy, fluoro or chloro.
Claim 3
Dependent Claim
14 words
A process of claim 1 wherein said alkalinedioxane solution is maintained under reflux conditions.
Claim 4
Dependent Claim
12 words
A process of claim 2 wherein the nitro compound reactant is m-nitro-β-chlorocinnamaldehyde.
Claim 5
Dependent Claim
72 words
A process for making an aldehyde compound of the following formula: ##STR5## which comprises contacting a compound of the following formula: ##STR6## R being ##STR7## and X is hydrogen, methyl, phenyl, methoxy, fluoro or chloro, with a solution of POCl 3 and dimethyl formamide to form corresponding aldehyde compound, pouring resultant solution into cold alkali bicarbonate while keeping pH of resultant mixture from 7 to about 9, and recovering precipitated aldehyde compound.
Claim 6
Dependent Claim
72 words
A process for making an aldehyde compound of the following formula: ##STR5## which comprises contacting a compound of the following formula: ##STR6## R being ##STR7## and X is hydrogen, methyl, phenyl, methoxy, fluoro or chloro, with a solution of POCl 3 and dimethyl formamide to form corresponding aldehyde compound, pouring resultant solution into cold alkali bicarbonate while keeping pH of resultant mixture from 7 to about 9, and recovering precipitated aldehyde compound.
Claim 7
Dependent Claim
24 words
A process of claim 4 wherein R is phenyl, NO 2 is meta or para to ##STR8## and the alkali bicarbonate is sodium bicarbonate.
References Cited (Backward Citations)
US3996289A
Cited
US3952067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |