Synthesis of 4-trifluoromethyl-3,4-dihydro-1,3,5-triazino[2,1-a]isoindol-2-ones by cyclocondensation of 1-aryl-1-chloro-2,2,2-trifluoroethyl isocyanates with 3-amino-1-arylimino-1H-isoindoles
摘要:
4-Trifluoromethyl-3,4-dihydro-1,3,5-triazino[2,1-a]isoindol-2-ones were prepared by reaction of 1-aryl-1-chloro-2,2,2-trifluoroethyl isocyanates with 3-amino-1-arylimino-1H-isoindoles in the presence of triethylamine. In some events alongside the main product isomeric 2-trifluoromethyl-2,3-dihydro-1,3,5-triazino[2,1-a]isoindol-4 ones were obtained. The regioselcctivity of the reaction is affected by sterical and electronic characteristics of substituents and by temperature.
Regioselective synthesis of 4-aryl-3,4-dihydro-1,3,5-triazino[2,1-a]isoindol-2-ones
作者:Angelina V. Biitseva、Olha V. Hordiyenko、Volodymyr A. Sukach、Myhailo V. Vovk、Konstantin A. Pichugin、Irina S. Konovalova、Oleg V. Shishkin
DOI:10.1007/s00706-008-0860-1
日期:2008.8
The condensation of binucleophilic 3-amino-1-arylimino-1H-isoindoles with bifunctional 1-chloro-benzylisocyanates occurs regioselectively resulting in 3,4-dihydro-1,3,5-triazino[2,1-a]isoindol-2-one derivatives. The structures of the synthesized compounds were unambiguously established by NOE experiments.