Method for preparing nitrobibenzyl systems
US4721821A · kind A · utility
2Cited by
6References
12Claims
0Family size
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Inventor
Key dates
| Filing date | Aug 14, 1986 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | Aug 14, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C201/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Method for preparing bibenzyl systems with nitro groups as substituents. Toluene derivates with nitro groups are coupled oxidatively in methanolic alkali solution under influence of metal catalysts. The oxidation is preferably done with air. As catalysts metal acetonylacetonates are used. The metal can be Ni, Cu, Co, Mn, Cr or Ti. This catalyst can be used together with a crown ether. Another suitable catalyst is a metal tetraphenylporphin of porfyrin type where the metal can be Ni, vanadium (V=O) or Fe(FeIII).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.