Addition and Cyclization Reactions in the Thermal Conversion of Hydrocarbons with an Enyne Structure, 5. High??Temperature Ring Closures of 1, 3??Hexadien??5?? …
J Hofmann, K Schulz, A Altmann, M Findeisen…
文献索引：Hofmann, Joerg; Schulz, Kathrin; Altmann, Annett; Findeisen, Matthias; Zimmermann, Gerhard Liebigs Annales, 1997 , # 12 p. 2541 - 2548
Abstract The 4-substituted 1-phenyl-1-butene-3-ynes 1a–c and the 2-ethynylstyrenes 7a–c were subjected to high-temperature pyrolysis. The cycloisomerization products isolated suggest that these are formed by three competing processes: by (i) an electrocyclic or a molecule-induced,(ii) an alkenylidene carbene controlled, and (iii) a radical-controlled ring- closure process. To estimate the relative importance of these three reactions here ...
