3-hydroxy-7,8-benzo-1,2,3,4-tetrahydroquinoline, which is used as a reagent for the analytical test reaction for nitrate and nitrite anions based on azo coupling with diazo compounds. 3-Hydroxy-6-(R-phenylazo)-7,8-benzo-1,2,3,4-tetrahydroquinolines (R = 2-COOH, 4-COOH, or 4-SO3H) were synthesized by azo coupling reactions in 65–70% yields. The structures of these compounds were confirmed by elemental analysis
提出了一种用于合成 3-羟基-7,8-苯并-
1,2,3,4-四氢喹啉的改进程序,该方法用作基于偶氮偶联的
硝酸根和
亚硝酸根阴离子的分析测试反应的试剂。重氮化合物。3-Hydroxy-6-(R-phenylazo)-7,8-benzo-1,2,3,4-tetrahydroquinolines (R = 2-COOH, 4-COOH, or 4-SO3H) 通过偶氮偶联反应合成65-70% 的产量。这些化合物的结构已通过元素分析、1H NMR 和 IR 光谱以及 X 射线衍射证实。根据 X 射线数据,与对羧基异构体相比,邻羧基异构体的紫外光谱中的红移 (Δλmax = 50 nm) 归因于强大的分子内氢键。