Information om | Engelska ordet CYCLOHEPTATRIENE

Exempel på hur man kan använda CYCLOHEPTATRIENE i en mening

• Cyclopropene can also be obtained in about 1% yield by thermolysis of the adduct of cycloheptatriene and dimethyl acetylenedicarboxylate.
• Its name derives from the molecule tropine from which cycloheptatriene (tropylidene) was first synthesized in 1881.
• Two selected methods for the synthesis of tropone are by selenium dioxide oxidation of cycloheptatriene and indirectly from tropinone by a Hofmann elimination and a bromination.
• Six-atom pi systems that have been employed in the reaction include tropone and tropone derivatives, fulvenes, and cycloheptatriene cobalt complexes.
• Electron donating groups (EDG) favor the norcaradiene, while electron withdrawing groups (EWG) favor the cycloheptatriene.
• In the case of arenes, the cyclopropanation product undergoes further electrocyclic ring opening to give cycloheptatriene products (Buchner ring expansion).
• The complex can be prepared by the reaction of titanocene dichloride, butyllithium, and cycloheptatriene.
• Unlike other seven-membered systems such as silepins and phosphepins, boron has a vacant p-orbital that can interact with the π and π* orbitals of the cycloheptatriene.

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