C. Chou, Cheng-Chang Wu, Wen-Hua Chen
Jul 10, 1995
Citations
0
Influential Citations
9
Citations
Journal
Tetrahedron Letters
Abstract
Abstract The temperature and pressure dependence of products formed on pyrolysis of 3-chloroformyl-2-methylpyridine ( 6 ) have been studied. Pyrolysis of 6 at 575 °C and ca. 1×10 −4 torr gives pyrido[b]cyclobuten-5-one ( 5 ) in 20% yield. Pyrolysis of 6 at 575 and 800 °C and under the pressure of ca. 1×10 −2 torr give 1-azafulvenallene ( 7 , 46%) and 1-cyanocyclopentadiene ( 8 , 42%), respectively. Irradiation of 5 ( λ > 300 nm) in methanol affords 2-methoxy-3-acetylpyridine ( 9 ) quantitatively.