Process for the preparation of symmetrical 2,2-methylenebisbenzotriazolyl phenols
US5229521A · kind A · utility
15Cited by
3References
10Claims
0Family size
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Key dates
| Filing date | Oct 23, 1992 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Oct 23, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D249/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds of formula ##STR1## wherein R.sub.1 is hydrogen alkyl, alkoxy, phenyl, phenylaklyl or halogen, and R.sub.2 is alkyl phenyl, phenylaklyl or cycloalkyl, are prepared by reacting a compound of formula ##STR2## with a compound of formula ##STR3## wherein R.sub.3 and R.sub.4 are alkyl, and formaldehyde, in a one-pot process in the absence of a solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.