Oxaspiropentyl ketones and acetals prepared from α-cyclopropylidene ketones and acetals undergo, with lithium halides, isomerisation to 2-acylcyclobutanones and monoacetals.
Schipperijn,A.J.; Smael,P., Recueil des Travaux Chimiques des Pays-Bas, 1973, vol. 92, p. 1298 - 1304
作者:Schipperijn,A.J.、Smael,P.
DOI:——
日期:——
HUET, F.;LECHEVALLIER, A.;CONIA, J. -M., CHEM. LETT., 1981, N 11, 1515-1518
作者:HUET, F.、LECHEVALLIER, A.、CONIA, J. -M.
DOI:——
日期:——
Faure, Robert; Leandri, Gilbert; Meou, Alain, Canadian Journal of Chemistry, 1981, vol. 59, p. 1089 - 1095
作者:Faure, Robert、Leandri, Gilbert、Meou, Alain
DOI:——
日期:——
Etude des petits cycles-XLIV
作者:A. Lechevallier、F. Huet、J.M. Conia
DOI:10.1016/s0040-4020(01)91582-0
日期:1983.1
epoxidation of α-cyclopropylidene alcohols). The isomerisation, either spontaneous or through reaction with lithium halides, of oxaspiropentyl ketones and acetals, gives 2-acyl-cyclobutanones and corresponding mono-acetals. These new unstable 1,3-diones nust be stored in CCl4 solution. They are present in the dione form only. They add water and methanol, in acidic and even in neutral medium, leading to ring