Author/Authors :
Sakamoto، نويسنده , , Masami and Yagi، نويسنده , , Tadao and Fujita، نويسنده , , Shohei and Ando، نويسنده , , Masaru and Mino، نويسنده , , Takashi and Yamaguchi، نويسنده , , Kentaro and Fujita، نويسنده , , Tsutomu، نويسنده ,
Abstract :
Irradiation of a benzene solution containing 2-alkoxynicotinic acid esters (0.02 M) and furan (0.2 M) resulted in the formation of cage-type adducts in 73–84% yield. The structure of the adducts was established by X-ray crystallographic analysis. The mechanism involving 4π+4π photocycloaddition between the pyridine ring and furan was postulated. Two diastereomeric 4π+4π adducts were detected as intermediates in the 1H NMR spectroscopy, when the solution was irradiated in the presence of diene as a triplet quencher.
