作者:Hoai V. Dang、Wolfgang Stadlbauer
DOI:10.1002/jhet.5570430110
日期:2006.1
Amination of 4-hydroxypyridocarbazolones 1 with aniline or benzylamine gave in good yields 4-amines 3. With piperidine in a sealed tube from 4-hydroxy- or 4-chloro-5-alkylpyridocarbazolones 1 or 4 ring opened 1-acylcarbazoles 5 were obtained. Only 4-hydroxy-5-phenyl-pyridocarbazolone 1d gave 4-amines 6. Reduction of 4-azidopyridocarbazolones 7 either by catalytic hydrogenation or in a 2-step synthesis
用苯胺或苄胺将4-羟基吡啶并咔唑酮1胺化,得到4-胺3的产率很高。用哌啶在密封管中从4-羟基-或4-氯-5-烷基吡啶并咔唑酮1或4开环得到1-酰基咔唑5。仅4-羟基-5-苯基-吡啶并咔唑酮1d给出4-胺6。通过催化氢化或在两步合成中通过磷腈8还原4-叠氮吡啶并咔唑酮7得到4-氨基吡啶并咔唑酮9。胺9也可从苄胺3中获得通过催化脱苄基作用。4-羟基-5- phenylpyridocarbazolone的一个步骤胺化1D 通过脱苄基化至9d中是通过用苄基氯化铵反应观察到。在升高的温度下,从1d开始形成高度熔融的6,13b-二氮杂茚并[1,2,3- hi ] chrysenone 10。