Method of preparing 2-aryl benzoxazoles and 2-aryl benzothiazoles
US4107169A · kind A · utility
8Cited by
1References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 20, 1977 |
| Grant date | Aug 15, 1978 |
| Priority date | — |
| Expiry date | Apr 20, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D277/66
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method is provided for the preparation of 2-arylbenzoxazoles and 2-arylbenzthiazoles which comprises reacting a trichloromethyl-substituted aromatic compound with an aromatic compound carrying one amino group and one hydroxy or mercapto group in ortho position to each other. The compounds obtained by the process of the invention form the basis of numerous optical brighteners and find use in dyes, cosmetics, pharmaceuticals and heat-resistant fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.