作者:Artem Cherepakha、Vladimir O. Kovtunenko、Andrey Tolmachev
DOI:10.1016/j.tetlet.2012.12.040
日期:2013.2
Condensations of o-halo-substituted benzenesulfonyl chlorides with 3-aminoazoles give the corresponding azolo[c][1,2,4]benzothiadiazine S,S-dioxides. o-Fluorobenzenesulfonyl chlorides and o-bromobenzenesulfonyl chlorides bearing a nitro group are reactive enough to give the desired azolo[c][1,2,4]benzothiadiazine S,S-dioxides in a one-pot, base-promoted reaction. In all other cases, open-chain sulfonylated
的缩合ø与3-卤代aminoazoles -取代的苯磺酰氯,得到相应的三唑并[ c ^ ] [1,2,4]苯并噻二嗪小号,š -dioxides。带有硝基的邻氟代苯磺酰氯和邻溴代苯磺酰氯具有足够的反应性,可以在一锅,碱促进的反应中得到所需的偶氮[ c ] [1,2,4]苯并噻二嗪S,S-二氧化物。在所有其他情况下,分离开链磺酰化的3-氨基唑中间体。加入铜(I)催化剂后,后者转化为标题化合物。