Cycloaddition Reactions of Nitrile Oxides to Silyl- and Germyl-Substituted Thiophene-1,1-dioxides
作者:Edmunds Lukevics、Pavel Arsenyan、Sergey Belyakov、Juris Popelis、Olga Pudova
DOI:10.1021/om9902129
日期:1999.8.1
Silyl- and-germyl substituted thiophene-1,1-dioxides were prepared from the corresponding thiophenes by oxidation with m-CPBA in CH2Cl2 at room temperature. The [2+3] dipolar cycloaddition of nitrile oxides to the double CC bonds of thiophene-1,1-dioxides has been investigated. It was shown that the reaction pathway strongly depends on the substituents M and M‘ in the heterocycle and the method of
通过在室温下在CH 2 Cl 2中用m-CPBA氧化由相应的噻吩制备甲硅烷基和锗烷基取代的噻吩-1,1-二氧化物。已研究了腈氧化物与噻吩-1,1-二氧化物的双C C键的[2 + 3]偶极环加成反应。结果表明,反应路径强烈依赖于杂环中的取代基M和M'以及产生一氧化氮的方法。2-叔丁基-5-三甲基甲硅烷基噻吩-1,1-二氧化物,2-三甲基甲硅烷基-5-三甲基锗烷基噻吩-1,1-二氧化物,2,5-双(三甲基锗)噻吩-1,1-二氧化物的分子结构,和4,4-二氧代-3-苯基-5-叔丁基-3a,6a-dihydrothieno [2,3- d]的混合物通过X射线衍射研究了具有4,4-二氧杂-3-苯基-5-三甲基锗基-3a,6a-二氢噻吩并[2,3 - d ]异恶唑啉-2(92:8)的]异恶唑啉-2。