Structure (I) is shown to be the correct formulation for the compound hitherto considered to be the “azine” of ethyl acetoacetate; I rearranges to IV. Both IV, 1(H)-3-methyl, and 1(H)-3-phenyl, 5-pyrazolones and related compounds are shown to exist in the enolic form (VII) in the solid state and predominantly so in the solvents in which they are soluble. Similarly the indazolones are found to be represented
Dumitrascu, Florea; Raileanu, Dan, Revue Roumaine de Chimie, 1992, vol. 37, # 11-12, p. 1247 - 1258
作者:Dumitrascu, Florea、Raileanu, Dan
DOI:——
日期:——
Anderson, Robert M., Journal of Chemical Research, Miniprint, 1985, # 12, p. 3933 - 3959
作者:Anderson, Robert M.
DOI:——
日期:——
Kinetically deduced existence of CO.....C close contacts. Pericyclic rearrangement of 1,2-diacetyl-1,2-dihydro-3-indazol-3-one
作者:Florea Dumitraşcu、Dan Rǎileanu
DOI:10.1016/0040-4039(94)02440-m
日期:1995.2
First-order kinetics of the title rearrangement to 3-acetoxy-1-acetylindazole (2a), complete exchange of O-acyl groups in cross-experiments, insensitivity to change in reaction medium, lack of electronic substituent effects and activation parameters are considered as evidence in favour of a pericyclic mechanism through C=(OC)-C-..... close contacts.
Dumitrascu Florea, Rileanu Dan, Rev. roum. chim., 37 (1992) N 11-12, S 1247-1258