Preparation of esters of 3,5,6-trichlorosalicyclic acid
US5442092A · kind A · utility
5Cited by
2References
18Claims
0Family size
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Inventors
Key dates
| Filing date | Apr 4, 1994 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Apr 4, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C69/88
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved process for the preparation of esters of 3,5,6-trichlorosalicylic acid which comprises reacting the acid with an alcohol under distillation conditions in the presence of a catalyst comprising a glycol titanate or glycol stannate. The process results in substantially quantitative yields of the ester without any significant side reactions, e.g. conversion of the alcohol to by-product ether.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.