142558-69-8Relevant articles and documents
The Chemistry of 5-Oxodihydroisoxazoles. XII. Trapping of Derived Ketenimines with Lithium Amides and Alkyllithiums
Ang, Kiah H.,Prager, Rolf H.,Williams, Craig M.
, p. 55 - 64 (2007/10/02)
Isoxazolones unsubstituted at C 3 react with lithium amides or alkyllithiums to give ketenimines.The presence of an ethoxycarbonyl group at C 4 allows capture of this species by addition of a second equivalent of the lithiated species to give enolates which can be alkylated in situ.The presence of a phenyl group at C 4 gives a ketenimine which reacts intramolecularly in the presence of lithium amides, whereas alkyllithiums undergo addition in synthetically useful processes.
The Photolysis Of Ethyl 5-Oxo-2-Phenyl-2,5-Dihydroisoxazole-4-Carboxylate In Amines And Alcohols
Ang, Kiah H.,Prager, Rolf H.
, p. 2845 - 2846 (2007/10/02)
Ethyl 5-oxo-2-phenyl-2,5-dihydroisoxazole-4-carboxylate (1) has been photolysed at 300 nm in a variety of alcohols and amines.The products suggest two competing photolytic pathways: reversible photoisomerisation to a ketene, and a loss of carbon dioxide t