氧方酸与一些含吸电基芳胺的反应及相关产物的吸收光谱  

REACTION OF OXOSQUARIC ACID WITH AROMATIC AMINE AND ABSORPTION SPECTRA OF THE PRODUCTS

作　　者：彭大权 衡林森 陈益钊[1] 李聚才[1] 郁陵庄[1] 李文藻[1] 赵华明[1] 

机构地区：[1]重庆师范专科学校,达县师专,四川大学化学系

出　　处：《四川大学学报（自然科学版）》1995年第5期560-565,共6页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金

摘　　要：以ＰＰＡ为催化剂实现了碱性极弱的２，４－二硝基苯胺、２，６－二氯－４－硝基苯胺和以内盐形式存在的对氨基苯磺酸与氧方酸的反应，制得了新化合物３ｅ～３ｇ；选择性地制备了苯环上含强吸电基的异方酰胺３ａ～３ｄ．并对３ａ～３ｆ的酰胺氢的酸性和成盐性进行了试验，对照测定了３和４的ＩＲ，ＵＶ／ｖｉｓ谱．３ａ～３ｆ（３ｂ除外）能与乙醇钠反应成盐，其中３ｅ和３ｆ酸性最强，其二钠盐４ｅ和４ｆ能稳定存在，有极强的深色位移，Δλ＿１＞２００ｎｍ，从紫外到可见光区都有吸收．３ｅ和３ｆ等可望用作直接分光光度法测定、ＣＨＣＯＯ－等的发色剂．The 2,4-dinitroaniline and 2,6-dichloro-4-nitroaniline,which are very weak baseand 4-aminobentenesulfonic acid,can react with oxosquaric acid.The reactions can be catalyed byPPA and the new compounds 3e～3g are obtained.The selective synthesis of iso-squarylium amide3a～3d is deseribed. The acidity of hydrogen in amide and possibility of forming salt of 3a～3f aretested. IR and UV/vis spectra of 3 and 4 are determined.The 3a～3f(except 3b)can react withethanol sodium and form salts,the acidity of 3e and 3f is strongest among the products. Theirdisodium salt 4e and 4f are stable and the bathochromic shift(Δλ_1 >200nm)is observed in UV-visspectra.3e and 3f are expected to be as chromophore in some anion.

关 键 词：方酸 异方酰胺 吸收光谱 氧方酸 吸电基 芳胺 

分 类 号：O624.42[理学—有机化学]