Process for the preparation of mercaptomethylphenols
US4874885A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1987 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Dec 15, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C323/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for the preparation of compounds of formula I or II ##STR1## from phenols by reaction with formaldehyde and mercaptans in the presence of mono-, di- or trimethylamine or mono- or diethylamine. The symbols R.sub.1 is alkyl, hydroxy or alkoxycarbonyl substituted alkyl; alkyl; aryl, cycloalkyl or aralkyl, R.sub.2 is hydrogen, alkyl, alkenyl or halogen, R.sub.3 and R.sub.4 are independently alkyl, allyl, cycloalkyl, phenyl, benzyl, halogen or --CH.sub.2 --S--R.sub.1, Z.sub.1 is --S-- or alkylene, and Z.sub.2 is hydrogen, alkyl or --CH.sub.2 --S--R.sub.1. The mercaptomethylphenols are valuable antioxidants for plastics, elastomers, mineral oils and synthetic lubricants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.