Imminium salts of enaminonitriles with polyenals gave stable 1-azapolyenes, which could be readily transformed to benzo- and indoloquinolizines in 1,6-electrocyclizations. Azatrienes and azatetraenes with formaldehyde and primary amines afforded pyrimido[6,1-a]isoquinolines.
烯胺腈与多元烯的
亚胺盐可生成稳定的1-氮杂多烯,可在1,6-电环化反应中将其轻松转化为苯并-和
吲哚并
喹啉。氮杂
三烯和氮杂四烯与
甲醛和
伯胺制得
嘧啶并[6,1- a ]
异喹啉。