68177-03-7

Upstream product

• 479-33-4 2,3,4,5-tetraphenylcyclopenta-2,4-dienone 
• 67959-49-3 7-Chlor-4,5,6,7,8,9-hexahydrocycloocta-1,2,3-selenadiazol 
• 75349-94-9 4,5,8,9-Tetrahydrocycloocta-1,2,3-selenadiazol 
• 68177-01-5 Cyclooct-(5Z)-en-1,2-dion-dihydrazon 

Relevant academic research and scientific papers

STRAINED CYCLOALKENYNES

Presently known strained cycloalkynes with one, two or three additional cis- or trans-configurated double bonds are summarized in Table 3.The main topics of the article are the geometrical ring strain, the preparation or in situ generation of these compounds by fragmentation of the corresponding 1,2,3-selendiazoles, and the thermal isomerisation processes performed at room temperature or in flash pyrolysis experiments at 440-640 deg C.

Synthesis of Cyclooctenynes

The three isomeric cis-cyclooctenynes 2-4 are prepared.The ring strain is enhanced in comparison to cyclooctyne (1) and increases from 1 to 4.The resulting consequences on life time and reactivity of the compounds are discussed.