117712-11-5Relevant articles and documents
Cycloaddition Reactions of 3-Methyloxazolium-5-olates to 4-Arylidene-5(4H)-isoxazolones
Clerici, Francesca,Erba, Emanuela,Mornatti, Pierluigi,Trimarco, Pasqualina
, p. 295 - 300 (2007/10/02)
The unstable cycloadducts formed from benzylideneisoxazolones 2 and oxazolium-5-olates 1 undergo CO2 elimination to afford the stereoisomeric substituted 3,7-diazaspirononane derivatives 3, which were isolated in one case (3a,b).On further reaction, compounds 3 are transformed into pyrrole-3-carboxylic acids 4.Reaction paths and regiochemical behaviour are discussed. - Keywords: 5(4H)-Isoxazolones, 4-arylidene-/ Muenchnones/ Pyrrole-3-carboxylic acids