70909-36-3Relevant articles and documents
Unusual Course of the Reaction of α-Acyl-γ-butyrolactones with 2-(2,6-Dihalogenphenylimino)imidazolidines
Staehle, Helmut,Koeppe, Herbert,Daniel, Helmut,Pook, Karl-Heinz,Foerster, Hans-Joachim,et al.
, p. 2841 - 2851 (2007/10/02)
Heating of α-acyl-γ-butyrolactones 1 with 2-(2,6-dihalogenophenylimino)imidazolidines 5 in HMPT unexpectedly leads to 7-halogeno-2,6-dihydro-4-alkyl-5,6-ethano-1H-diazepinobenzimidazoles 7 in low yields.The structures of 7 are derived from spectroscopic data, oxidative degradation to benzimidazole derivative 9 and an X-ray structure analysis.A possible pathway for the formation of 7 is discussed.