Author/Authors :
Kawashima، نويسنده , , Keisuke and Hiromoto، نويسنده , , Masanori and Hayashi، نويسنده , , Kyohei and Kakehi، نويسنده , , Akikazu and Shiro، نويسنده , , Motoo and Noguchi، نويسنده , , Michihiko، نويسنده ,
Abstract :
The reaction of functionalized azomethine ylides as C-unsubstituted nitrile ylide equivalents with acetylenic dipolarophiles is mentioned. Therein, the initially formed cycloadducts, 2,5-dihydropyrroles, by the reaction of the azomethine ylides with substituted acetylenes, undergo a fission reaction to afford 2H-pyrroles and the parent heterocyclic system. Some 2H-pyrroles isomerized to 1H-pyrroles under both thermal and acidic conditions.
