Ring-Closing Metathesis Reactions on Azinium Salts: Straightforward Access to Quinolizinium Cations and Their Dihydro Derivatives
作者:Ana Nuñez、Beatriz Abarca、Ana M. Cuadro、Julio Alvarez-Builla、Juan J. Vaquero
DOI:10.1021/jo900292b
日期:2009.6.5
proved to be an efficient approach to 3,4-dihydro- and 1,2-dihydroquinolizinium salts and the corresponding quinolizinium derivatives by an improved thermal oxidation in the presence of Pd/C without solvent. A comparative study showed that the quinolizinium system was obtained in better yields through the 3,4-dihydroquinolizinium route, thus allowing the synthesis of quinolizinium derivatives or improvements
使用第二代Grubbs和Hoveyda-Grubbs催化剂进行的1-丁烯基-2-乙烯基吡啶鎓盐和2-丁烯基-1-乙烯基吡啶鎓盐的闭环复分解反应被证明是3,4-二氢和1,2的有效方法在没有溶剂的情况下,在Pd / C存在下,通过改进的热氧化反应制得-二氢喹啉鎓盐和相应的喹啉鎓衍生物。一项比较研究表明,通过3,4-二氢喹啉鎓途径获得的喹啉鎓体系的收率更高,因此可以合成喹啉鎓衍生物或提高先前报道的某些实施例的产率。