Process for the preparation of amines
US5457233A · kind A · utility
1Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 28, 1994 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Nov 28, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/28
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of amines of formula ##STR1## wherein the variables are defined as in the claims, which comprises reacting 1 molar equivalent of an amine of formula ##STR2## with 0.8 to 1.5 molar equivalents of an aldehyde of formula EQU R--CHO (3) and 0.8 to 2 molar equivalents of formic acid, in aqueous medium, and adjusting the pH by addition of a mineral acid such that, at the conclusion of the reaction, the pH is in the range from 3 to 7. The compounds obtainable by the process are useful intermediates for the synthesis of dyeing assistants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.