Synthesis of 3(2-haloethyl)aryltriazenes and study of their reactions in aqueous solution
作者:J. William Lown、Ranjit Singh
DOI:10.1139/v81-198
日期:1981.5.1
rates of decomposition in aqueous media at pH7 were determined polarographically employing the electrochemically active triazene moiety. In two selected cases the rates of decomposition increase markedly with lowered pH in the range 9.3 to 4.65. The products of aqueous decomposition, both volatile and involatile, were identified and quantitated by gc and gc–ms. Discrimination between alternative decomposition
已经合成了几种 1-芳基-3-(2-卤乙基) 三氮烯,并通过光谱和 3,5-二硝基苯甲酸的酯化对其进行了表征。它们在 pH7 的水性介质中的分解速率通过使用电化学活性三氮烯部分的极谱法测定。在两个选定的情况下,分解速率随着 pH 值在 9.3 到 4.65 范围内的降低而显着增加。水分解产物,包括挥发性和非挥发性的,通过 gc 和 gc-ms 进行鉴定和定量。通过制备和使用选择性氘化三氮烯,可以区分不同的分解途径。该数据与三氮烯的初始质子化和由此产生的 2-卤乙基阳离子(或其动力学等价物)一致,该阳离子经受通过氘加扰检测的重排。第二种竞争途径涉及将三氮烯环化为 1-芳基-1,2,3-三唑啉中间体,然后进行亲核反应...