Cu(<scp>i</scp>) catalysed annulation of isothiocyanates/isocyanates with 2-iodo-sulfonamides: synthesis of benzodithiazines, benzothiadiazinones, benzothiazinylidene-anilines and benzothiazolylidene-anilines
作者:K. Sandeep、Alla Siva Reddy、K. C. Kumara Swamy
DOI:10.1039/c9ob00994a
日期:——
Cu(i)-catalysed cyclisation reaction of 2-iodobenzene sulfonamides with aryl-isothiocyanates and isocyanates that affords functionalised benzodithiazines and benzothiadiazinones, respectively, has been developed. Thus, in the reaction with aryl isothiocyanates (Ar-N[double bond, length as m-dash]C[double bond, length as m-dash]S), the C[double bond, length as m-dash]S moiety participates in the cyclisation leading
已经开发出有效的Cu(i)催化的2-碘代苯磺酰胺与芳基-异硫氰酸酯和异氰酸酯的环化反应,分别提供官能化的苯并二噻嗪和苯并噻二嗪酮。因此,在与异硫氰酸芳基酯(Ar-N [双键,长度为m-破折号C [双键,长度为m-破折号S])的反应中,C [双键,长度为破折号S部分参与导致二噻嗪的环化反应。相反,在芳基异氰酸酯的情况下(Ar-N [双键,长度为m-破折号C [双键,长度为m-破折号O]),N [双键,长度为补折号C]部分参与环化并获得噻二嗪酮。异硫氰酸酯与N-甲苯磺酰基-2-碘-苯胺和2-碘-苄基磺酰胺的类似反应可得到(苯并噻嗪-2-亚基)苯胺和(苯并噻唑-2-亚基)苯胺,分别。简要讨论了可能的机理途径。