Process for O-acylating phenol derivatives and acylating compositions for this purpose
US4323469A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1980 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | Oct 28, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D307/86
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of carbamic acid phenyl esters of the formula (I) ##STR1## by acylating phenol derivatives of the formula (II) ##STR2## wherein R is alkyl having 1 to 8 carbon atoms, aryl, cycloalkyl having 5 or 6 carbon atoms, aralkyl having 7 to 16 carbon atoms which groups can be substituted by one or more alkyl groups, PA0 R.sup.1 is hydrogen, alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms or acylamino, PA0 R.sup.2 is hydrogen, halogen, alkyl having 1 to 4 carbon atoms or alkoxy having 1 to 4 carbon atoms, or if PA0 R.sup.1 and R.sup.2 represent alkyl and/or alkoxy, they can form together a carbocyclic ring. According to the invention the phenol derivatives of the general formula (II), wherein R.sup.1 and R.sup.2 are as defined above, are reacted with N-carbamoyl-saccharin derivatives of the formula (IV) ##STR3## wherein R has the same meaning as defined above, in the presence of a base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.