Substituteed tetrahydropyrimidine derivatives and their use as polymerization inhibitors for vinyl aromatic compounds
US5847035A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Mar 13, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3462
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed to substituted tetrahydropyrimidine derivatives of the general formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7, which may be the same or different, are hydrogen or alkyl aryl, cycloalkyl, alkaryl, aralkyl or heterocyclic, or substituted derivative thereof, R.sup.6 or R.sup.7 can additionally be --OH or --NR.sup.8 wherein R.sup.8 is hydrogen, alkyl, aryl, cycloalkyl, alkaryl, aralkyl or heterocyclic, or substituted derivative thereof, or R.sup.6 and R.sup.7 together can be .dbd.O or .dbd.NOH, and any two R groups on the same or adjacent carbon atoms can be joined in a cyclic configuration, and X is oxyl or hydroxy, it being provided that at least one of R.sup.2 and R.sup.3 and at least one of R.sup.4 and R.sup.5 are other than hydrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.