Supported mercaptosulfonic acid compounds useful as catalysts for phenolation reactions
US6133190A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1999 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Mar 23, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A catalyst useful for the condensation of an aldehyde or ketone starting material with a phenol is an insoluble mercaptosulfonic acid compound. The heterogeneous catalysts comprise catalytically-active species represented by the formula: ##STR1## L is an optional linking group and--is a bond, which catalytically-active species is attached by the bond--to an insoluble organic or inorganic support; PA1 or a catalytically-active species represented by the formula: ##STR2## wherein L' is an optional linking group,--is a bond and .theta.' and .theta." are residues of .theta., and a and b are independently selected from integers equal to or greater than 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.