'Compounds 1 and 2: 25 mmol each; catalyst: 50 mg.** ljsing piperidine as base." The microanalyses of the recrystallized (ethanol) new compounds" Yield not stated. showed the following maximum deviations from the calculated val-'When the reaction is carried out at reflux temperature the Michael “B51 C. i040; H,-_l-0.17; N, 10.04; Cl,+ 0.12. adduct (3) is obtained in poor yield due to a retro-Claisen reac-Using NaOH as base. tion.
[Said, Said A.; Amr, Abd El-Galil E.; Sabry, Nermien M.; Abdalla, Mohamed M. European Journal of Medicinal Chemistry, 2009 , vol. 44, # 12 p. 4787 - 4792]
