A Copper‐Catalyzed Synthesis of Pyrroles through Photochemically Generated Acylazirines
作者:Jan Paternoga、Till Opatz
DOI:10.1002/ejoc.201901176
日期:2019.11.14
A protocol for the synthesis of highly substituted 2,4‐diacypryrroles via a copper‐catalyzed ring strain releasing dimerization reaction was developed. The pyrroles are synthesized combining UV–photochemistry and metal‐catalyzed follow up reaction in an one‐pot system. To match the rates of the thermal and the photoinduced step, an internal temperature control was established.
Iron dichloride induced isomerization or reductive cleavage of isoxazoles: A facile synthesis of 2-carboxy-azirines
作者:Sergio Auricchio、Antonella Bini、Eros Pastormerlo、Ada M. Truscello
DOI:10.1016/s0040-4020(97)00696-0
日期:1997.8
5-Alkoxy-isoxazoles and N,N-disubstituted-5-isoxazolamines were found to isomerize to azirine derivatives by the use of iron dichloride as catalyst. On the contrary 5-alkyl- and 5-aryl-isoxazoles in the presence of the same salt, undergo reductive cleavage to enaminoketones. A common reaction intermediate is proposed. (C) 1997 Elsevier Science Ltd.