Waste-Free Chemistry of Diazonium Salts and Benign Separation of Coupling Products in Solid Salt Reactions
作者:Gerd Kaupp、Andreas Herrmann、Jens Schmeyers
DOI:10.1002/1521-3765(20020315)8:6<1395::aid-chem1395>3.0.co;2-l
日期:2002.3.15
and anilines to give the triazenes. Azo couplings are achieved with quantitative yields by cautious co-grinding of solid diazonium salts with beta-naphthol and C-H acidic heterocycles, such as barbituric acids or pyrazolinones. Solid diazonium salts may be more easily applied in a stoichiometric ratio for couplings in solution. Co-grinding of solid diazonium salts with KI gives quantitative yields of
气固和固固技术可在重氮盐化学过程中实现无浪费的定量合成。研究了用反应性气体NO(2),NO和NOCl重氮化的五种技术。两种类型通过原子力显微镜(AFM)进行了机械研究,并根据已知的晶体堆积进行了解释。相同的原理适用于由一步反应衍生的级联反应。固体重氮盐与固体二苯胺和苯胺定量偶合,得到三氮烯。偶氮偶联通过定量重磨固体重氮盐与β-萘酚和CH酸性杂环(如巴比妥酸或吡唑啉酮)而定量获得。固体重氮盐可以化学计量比更容易地用于溶液中的偶联。固体重氮盐与KI共同研磨可定量获得各种固体芳基碘化物。盐反应中不可避免的偶合产物以高度良性的方式从不溶性产物中完全分离出来。固态反应优于产生大量废料的类似溶液反应。用IR和NMR光谱及质谱法阐明了产物的结构,同时用B3LYP / 6-31G *和BLYP / 6-31G **水平的密度泛函计算研究了化合物的互变异构性质。固态反应优于产生大量废料的类似溶液反应。用IR