Preparation of 3,5-diaminobenzotrifluoride
AssigneeOccidental Chemical Corporation
InventorDavid E. Albright, Jr.
Life of this patent
Estimating the term…
Abstract
3,5-Diaminobenzotrifluoride can be produced, in a single step, by reacting 4-chloro-3,5-dinitrobenzotrifluoride, in methanol, with hydrogen gas, in the presence of magnesium oxide, and in the presence of a catalyst comprising palladium on a carbon support.
Claims20
A process for the preparation of 3,5-diaminobenzotrifluoride which comprises treating 4-chloro-3,5-dinitrobenzotrifluoride, in a methanol solvent, with hydrogen gas in the presence of magnesium oxide and in the presence of a catalyst which comprises palladium on a carbon support.
A method of converting at least 87% of 4-chloro-3,5-dinitrobenzotrifluoride into 3,5-diaminobenzotrifluoride and into less than 0.5% 4-chloro-3,5-diaminobenzotrifluoride comprising
- (A) preparing a mixture of a solution of up to 0.17 g/mL 4-chloro-3,5-dinitrobenzotrifluoride in methanol in the presence of hydrogen, a palladium or carbon catalyst, and at least one equivalent of magnesium oxide;
- and
- (B) heating said mixture to a temperature between room temperature and 125.degree. C.
Dependencies are inferred from the claim text.