2-Amino-4-ethynylphenol
US4181681A · kind A · utility
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3References
2Claims
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Assignee
Inventors
Key dates
| Filing date | Jul 19, 1978 |
| Grant date | Jan 1, 1980 |
| Priority date | — |
| Expiry date | Jul 19, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C205/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-Amino-4-ethynylphenol, a novel compound, is prepared by a four-step synthetic sequence in which the key reaction is the treatment of 4-acetoxy-3-nitroacetophenone with a Vilsmeier reagent derived from N,N-dimethylformamide and phosphorus oxychloride. The compound is useful as an endcapping agent in the synthesis of fluorocarbon ether bibenzoxazole oligomers which, because of the presence of acetylenic terminal groups, can be cured by thermal means to provide broad-use temperature, fuel and fluid resistant vulcanizates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.