研究了以DTBP为氧化剂和甲基自由基源的2-芳基苯并咪唑的无金属氧化自由基甲基化/芳基化反应。反应通过顺序的甲基自由基加成/环化途径进行,并以中等至良好的产率提供了一系列甲基官能化的苯并咪唑并[2,1 - a ]异喹啉-6(5 H)-one。此外,用DTAP还可以实现2-芳基苯并咪唑的乙基化/芳基化。
A decarboxylative radical addition/cyclization strategy was developed, by which a wide range of benzimidazo[2,1-a]isoquinoline-6(5H)-ones were prepared via reaction of 2-arylbenzoimidazoles and carboxylic acids.
Metal-free oxidative acylation/cyclization of <i>N</i>-methacryloyl-2-phenylbenzoimidazole with aryl aldehydes: an easy access to benzimidazo[2,1-<i>a</i>]isoquinolin-6(5<i>H</i>)-ones
作者:Ramesh Boora、G. Ravi kumar、B. V. Subba Reddy
DOI:10.1039/c9ob01979k
日期:——
A metal-free radicalcyclization strategy has been developed for the synthesis of fused benzimidazo[2,1-a]isoquinolin-6(5H)-one derivatives from N-methacryloyl-2-arylbenzoimidazole and aryl aldehydes using 70% tert-butylhydroperoxide in water (TBHP). The reaction proceeds through a sequential acyl radical addition/cyclization strategy. This method is useful for the generation of biologically relevant
已开发了一种金属自由基环化策略,用于使用70%叔丁基氢过氧化物从N-甲基丙烯酰基-2-芳基苯并咪唑和芳基醛类合成稠合的苯并咪唑并[2,1- a ]异喹啉-6(5 H)-一衍生物在水中(TBHP)。反应通过顺序的酰基自由基加成/环化策略进行。该方法可用于在一步过程中生成生物学上相关的四环支架。