Abstract
AbstractThe thermal conversion of 1‐phenyl‐1‐buten‐3‐yne (1) into the cycloisomerization products naphthalene (2), azulene (3), and 1‐methylene‐1H‐indene (4) has been studied at temperatures between 550 and 1000°C, a reaction time of approximately 0.3 s at 13 Torr (FVP) and at low partial pressures in a quartz flow system. The results obtained by FVP as well as in the presence of chemically modified diluent gases suggest a predominance of unimolecular cycloisomerizations to 2 and 3 which are, however, always accompanied by radical cyclization reactions to 2 and 4 even under FVP conditions if temperatures above 550°C are applied.
Published Version
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