1346463-84-0Relevant articles and documents
Substituent effects on the iodine-catalyzed thermal cyclization of 3,4-diphenylbuta-1,3-dienyl isocyanates: Mechanistic studies
Chuang, Ta-Hsien,Chang, Wei-Yu,Li, Chien-Fu,Wen, Yu-Chia,Tsai, Chia-Chen
supporting information; experimental part, p. 9678 - 9686 (2012/01/05)
The thermal cyclization of 3,4-diphenylbuta-1,3-dienyl isocyanates 1, generated in situ from the corresponding azides, was investigated using iodine as a catalyst. Diphenylpyridinones 2, phenylnaphthalenes 3, and indenes 4 were produced via intramolecular ring closure. The nature of the substituents on the phenyl rings was found to be crucial to the distribution of cyclized products 2 - 4. The mechanism of the reaction is also discussed.