The Influence of Different Solvents on 2-Ammonio-4-chloro-5-methylbenzenesulfonate, Including Its De- and Resulfonation
作者:Sándor L. Bekö、Jan W. Bats、Edith Alig、Martin U. Schmidt
DOI:10.1007/s10870-013-0467-1
日期:2013.12
The title compound (2-ammonio-4-chloro-5-methylbenzenesulfonate), C7H8ClNO3S, 1, is an intermediate in the synthesis of laked red and yellow azo pigments. Heating 1 in 2-picoline, quinoline and N,N′-dimethylacetamide (DMAc) [or N-methyl-2-pyrrolidone (NMP)] resulted in the formation of three different compounds: a 2-picolinium hydrate (2), a quinolinium quinoline solvate (3), and a sulfate of the desulfonated title compound (4). The three new compounds were structurally characterised using single-crystal diffraction data and chemically using thermal analysis (DTA/TGA), elemental analysis and spectroscopic methods (IR and NMR). By heating 2, 3 and 4 in the solid state, compound 1 is obtained again. In the case of 4, this corresponds to a desulfonation-resulfonation reaction in subsequent steps, which is rarely observed as such. The title compound 2-ammonio-4-chloro-5-methylbenzenesulfonate was heated in 2-picoline, quinoline and N,N′-dimethylacetamide (DMAc) resulting in the formation of three different compounds: a 2-picolinium hydrate (2), a quinolinium quinoline solvate (3), and a sulfate of the desulfonated title compound (4 see Figure). Heating 2, 3 and 4 in the solid state, compound 1 is obtained again. In the case of 4, this corresponds to a desulfonation-resulfonation reaction in subsequent steps, which is rarely observed as such.
标题化合物(2-氨基-4-氯-5-甲基苯磺酸盐),C7H8ClNO3S,1,是湖红色和黄色偶氮颜料合成中的中间体。在2-吡啶、喹啉和N,N′-二甲基乙酰胺(DMAc)[或N-甲基-2-吡咯烷酮(NMP)]中加热1,生成了三种不同的化合物:2-吡啶铵水合物(2)、喹啉喹啉溶剂合物(3)和脱磺酸化标题化合物的硫酸盐(4)。这三种新化合物通过单晶衍射数据进行结构表征,并通过热分析(DTA/TGA)、元素分析和光谱方法(IR和NMR)进行化学表征。通过对2、3和4进行固态加热,可以再次获得化合物1。在4的情况下,这对应于随后的脱磺酸化-再磺酸化反应,这种反应较少被观察到。标题化合物2-氨基-4-氯-5-甲基苯磺酸盐在2-吡啶、喹啉和N,N′-二甲基乙酰胺(DMAc)中加热,形成了三种不同的化合物:2-吡啶铵水合物(2)、喹啉喹啉溶剂合物(3)和脱磺酸化标题化合物的硫酸盐(4,见图)。对2、3和4进行固态加热,可以再次获得化合物1。在4的情况下,这对应于随后的脱磺酸化-再磺酸化反应,这种反应较少被观察到。