Bis(azafulvene) was isolated in 55% yield by the reaction of 4 equivalents of phenyllithium with 5,5′-diformyl-3,3′,4,4′-tetraethyl-2,2′-bipyrrole followed by quenching with acetic anhydride. Unstable bis(azafulvene)s were obtained in much higher yields by dehydrating 5,5′-bis(hydroxymethyl) derivatives of 2,2′-bipyrrole and gem-dimethyl-2,2′-dipyrrylmethane with (Boc)2O–DMAP at room temperature. X-Ray crystallography of two bis(azafulvene)s is reported.
通过 4 当量的
苯基锂与 5,5'-二甲酰基-3,3',4,4'-四乙基-2,2'-联
吡咯反应,然后用
乙酸酐猝灭,以 55% 的收率分离出双(氮杂富烯) 。通过在 (Boc)2O-
DMAP 下将 2,2'-联
吡咯和偕二甲基-2,2'-二
吡咯甲烷的 5,5'-双(羟甲基)衍
生物脱
水,可以以更高的产率获得不稳定的双(氮杂富烯)。室温。报道了两种双(氮杂富烯)的 X 射线晶体学。