Structure and Reactivity of 3,3-Disubstituted 1-(5-Nitro-2,1-benzisothiazol-3-yl)triazenes
作者:Josef Přikryl、Antonín Lyčka、Valerio Bertolasi、Michal Holčapek、Vladimír Macháček
DOI:10.1002/ejoc.200300370
日期:2003.11
5-nitro-2,1-benzisothiazole-3-diazonium species and N-substituted anilines produces the 1-(5-nitro-2,1-benzisothiazol-3-yl)-3,3-disubstituted triazenes 1. These triazenes are highly stable, and even in strongly acidic medium (0.5 mol⋅L−1 H2SO4) they are only slowly decomposed back to the diazonium ion and substituted anilinium ion (for the N-ethyl derivative in 0.5 mol·L−1 H2SO4 at 25 °C, t1/2 ≈ 7 h). A series
5-硝基-2,1-苯并异噻唑-3-重氮物种与N-取代苯胺之间的反应产生1-(5-硝基-2,1-苯并异噻唑-3-基)-3,3-二取代三氮烯1。这些三氮烯非常稳定,即使在强酸性介质(0.5 mol·L-1 H2SO4)中,它们也只能缓慢分解回重氮离子和取代苯胺离子(对于 N-乙基衍生物在 0.5 mol·L-1 H2SO4在 25 °C,t1/2 ≈ 7 小时)。一系列六个三氮烯通过它们的 1H 和 13C NMR 谱和质谱进行了表征。还通过 X 射线晶体学鉴定了两种三氮烯。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)