13234-21-4Relevant articles and documents
Isomerization of olefins in the presence of reactive impurities
-
, (2008/06/13)
A process and catalyst for isomerizing olefins are disclosed. The process and catalyst are particularly useful for isomerizing alkenyl bridged ring compounds to the corresponding alkyladiene bridged ring compounds. In one embodiment, the isomerization catalyst comprises an oxygen treated mixture of an alkali metal on a dried support having a surface area of 125 to 195 m2 /g when the support consists essentially of alumina wherein the alumina precursor is a large crystallite pseudoboehmite. The catalyst is particularly useful for isomerizing 5-vinyl-2-norbornene to 5-ethylidiene-2-norbornene. The catalyst is very active and highly selective and resistant to catalyst poisons. The process contacts the catalyst with an alkenyl bridged ring compound and yields the corresponding alkyladiene bridged ring compound.
Catalyst and process for the isomerization of olefins in the presence of reactive impurities
-
, (2008/06/13)
A process and catalyst for isomerizing olefins are disclosed. The process and catalyst are particularly useful for isomerizing alkenyl bridged ring compounds to the corresponding alkyladiene bridged ring compounds. In one embodiment, the isomerization catalyst comprises an oxygen treated mixture of an alkali metal on a dried support having a surface area of 125 to 195 m2 /g when the support consists essentially of alumina wherein the alumina precursor is a large crystallite pseudoboehmite. The catalyst is particularly useful for isomerizing 5-vinyl-2-norbornene to 5-ethylidiene-2-norbornene. The catalyst is very active and highly selective and resistant to catalyst poisons. The process contacts the catalyst with an alkenyl bridged ring compound and yields the corresponding alkyladiene bridged ring compound.
NEW POSSIBILITIES FOR CONTROL OF THE TRANSANNULAR CYCLIZATION OF 1,5-DIENES IN THE RITTER REACTION AS ILLUSTRATED BY METHYL-CIS-BICYCLONONA-3,7-DIENES
Nigmatova, V. B.,Andreev, V. A.,Pekhk, T. I.,Belikova, N. A.,Bobyleva, A. A.,et al.
, p. 2213 - 2223 (2007/10/02)
In the Ritter reaction 3-methyl and 3,4-dimethyl-cis-bicyclonona-3,7-dienes are converted either exclusively into acetylamines having the initial structure or into transannular cyclization products of the tricyclo3,7>nonane (brex