Dimerization of norbornadiene to a mixture of exo-endo and endo-endo hexacyclic dimers
US4275254A · kind A · utility
4Cited by
5References
11Claims
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Key dates
| Filing date | Dec 11, 1975 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Dec 11, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/90
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Norbornadiene [bicyclo (2.2.1) heptadiene-2,5] is dimerized to a mixture of mainly the exo-endo stereoisomer of the hexacylic dimer of norbornadiene at both an excellent selectivity and conversion using an effective amount of a two component catalytic system of rhodium acetylacetonate and diethylaluminum chloride or ethylaluminum dichloride or aluminum ethylsesquichloride. The mixture also contains the endo-endo stereoisomer and some trimer. After hydrogenation a suitable mixture of the exo-endo and endo-endo dimers can be used as a component of high energy fuel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.