Reactions of the alkyl radical attached to the ring nitrogen of 2-phenylthio-indole, -benzimidazole and -uracil
作者:Tomohiro Uetake、Mayumi Nishikawa、Masaru Tada
DOI:10.1039/a705139e
日期:——
the method of radical generation except for the substantial formation of alkyl phenyl sulfide, a radical substitution product of the alkylcobaloximes, in the photolysis of the cobaloximes. The cobaloxime(II) species, which exists in the reaction system N-alkyl bromide–triphenyltincobaloxime, activates the phenylthio group for the radical substitution, and the lack of the tin hydride makes it possible
在2-苯基硫代吲哚,2-苯基硫代苯并咪唑和6-苯基硫氧嘧啶衍生物的1- N-烷基上已生成烷基。这些N-烷基自由基是由相应的N-烷基溴化物通过氢化三苯锡-偶氮异丁腈,三苯基锡-钴肟的作用或相应的N-烷基钴肟的光解反应生成的。除了在烷基肟的光解中基本形成烷基苯基硫化物(烷基钴肟的自由基取代产物)以外,反应方式与自由基生成方法几乎没有不同。存在于反应体系N中的钴氧肟(II)物种-烷基溴化物-三苯基锡钴氧肟可活化苯硫基以进行自由基取代,而氢化锡的缺乏使得反应发生的浓度可能高于与氢化物试剂的反应浓度。