Nitrosation of aromatic compounds
US4232175A · kind A · utility
7Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1977 |
| Grant date | Nov 4, 1980 |
| Priority date | — |
| Expiry date | Dec 8, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C201/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Aromatic compounds in an acidic, aqueous solution can be economically nitrosated by treatment with the hydration products of oxides of nitrogen at a temperature in the range of -15.degree. C. to 10.degree. C. The oxides of nitrogen are generated as a gas from a separate solution or slurry by the reaction of an alkali metal nitrate with a strong mineral acid at a temperature in the range of 15.degree. C. to 35.degree. C. This method of nitrosation employs relatively inexpensive reagents, but can be carried on continuously and produces unexpectedly high yield of para-nitrosated product from a monosubstituted starting material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.