1997 pyrrole derivatives

pyrrole derivativesR 0120

38 - 158Generation and 1,3-Dipolar Cycloadditions of Fluorine-ContainingAzomethine Ylides Derived from Difluorocarbene and Imines. —1,3-Dipolar cycloaddition of labile iminofluoromethanides with electron-deficientalkenes (I), (VI), and (X) is accomplished by in situ generation of the 1,3-dipolesfrom the corresponding imines (II) and (VII) and difluorocarbene, which isobtained by the reduction of CF2Br2 with lead in the presence of Bu4NBr. —(NOVIKOV, M. S.; KHLEBNIKOV, A. F.; MASALEV, A. E.; KOSTIKOV, R.R.; Tetrahedron Lett. 38 (1997) 23, 4187-4190; Dep. Chem., St. PetersburgState Univ., St. Petersburg 198904, Russia; EN)

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