The synthesis of aromatic diazatricycles from phenylenediamine-bis(methylene Meldrum's acid) derivatives
作者:Gabriele Ina Graf、Daniel Hastreiter、Luiz Everson da Silva、Ricardo Andrade Rebelo、Antonio Garrido Montalban、Alexander McKillop
DOI:10.1016/s0040-4020(02)01085-2
日期:2002.10
The thermocyclisation of phenylenediamine-bis(methylene Meldrum's acid) derivatives has been investigated. Those of o-phenylenediamines give 1,10-phenanthroline derivatives, while those of m- and p-phenylenediamines lead to the preferential formation of angular diazatricycles. Thus, for example, the di-Meldrum's acid derivative of 2,5-dichloro-1,4-phenylenediamine gives, via ipso-substitution, the unexpected
已经研究了苯二胺-双(亚甲基梅德鲁姆酸)衍生物的热环化。那些的ø苯二胺给予1,10-菲咯啉衍生物,而那些的米-和p苯二胺导致优先形成角diazatricycles的。因此,例如,2,5-二氯-1,4-苯二胺的二麦德鲁姆酸衍生物通过ipso-取代给出了意想不到的角产物19。