Nitro derivatives of 2,1-benzisothiazoline 2,2-dioxide (benzosultams) undergo thermal elimination of sulfur dioxide yielding very reactive, non-isolable azo-ortho-xylylenes. It was found that this reaction can be performed in the injector of the gas chromatograph at 300 – 350°C and the formed aza-ortho-xylylenes can be trapped by appropriate reagents added to the injected solution. In the preliminary
2,1-
苯并噻唑啉2,2-
二氧化氮(苯并舒马坦)的硝基衍
生物经过热消除
二氧化硫,生成非常活泼的,不可分离的偶氮-
邻二甲苯基。发现该反应可在气相色谱仪的进样器中于300 – 350°C进行,并且形成的氮杂
邻二甲苯基可被添加到注入溶液中的适当试剂截留。在初步实验中,将氮杂
邻二甲苯与亲二烯体(
丙烯酸甲酯,
马来酸二甲酯,
乙酸乙烯酯,N-苯基马来
酰亚胺等),形成[4 + 2]环加成反应产物,并与亲核试剂(醇,胺)形成适当的加合物。在没有捕获试剂的情况下,形成了氮杂
邻二甲苯的二聚体。