The dimer of 3-bromo-6-dimethylam1no-1-azafulvene, is shown to function as a formal equivalent of 4-lithio- or 4.5-dilithiopyrrole-2-carboxaldehyde and consequently it is a progenitor, par excellence, of 4-mono- and 4,5-disubstituted pyrrole-2-carboxaldehydes.
3-溴-6-二甲基am1no-1-氮杂富烯的二聚体显示出与4-
硫代或4.5-二
硫代
吡咯-2-碳醛的形式等效,因此,它是4-mono的祖先。 -和4,5-二取代的
吡咯-2-甲醛。