Ring transformations of heterocyclic compounds. XVII, 2-(2,4,6-Triarylphenyl) substituted dihydro-1<i>H</i>-imidazolium, dihydrothiazolium and thiazolium salts from 2-methyl derivatives by pyrylium and thiopyrylium ring transformations
作者:Thomas Zimmermann
DOI:10.1002/jhet.5570360339
日期:1999.5
The synthesis of hitherto unknown 2-(2,4,6-triarylphenyl) substituted 4,5-dihydro-1H-imidazolium perchlorates 6, 4,5-dihydrothiazolium perchlorates 8 and thiazolium perchlorates 9 from their 2-methyl derivatives 2, 4 and 5, respectively, by a 2,6-[C5+C] ring transformation of 2,4,6-triarylpyrylium and -thiopyrylium salts 1/10 in ethanol in the presence of an appropriate base (6: sodium ethanolate;
迄今未知的2-(2,4,6- triarylphenyl)的合成取代的4,5-二氢- 1 H ^ -咪唑高氯酸盐6,4,5- dihydrothiazolium高氯酸盐8和噻唑鎓高氯酸盐9从它们的2-甲基衍生物2,4和5分别是在适当的碱存在下,在乙醇中将2,4,6-三芳基吡啶鎓盐和-硫代吡啶鎓盐1/10进行2,6- [C 5 + C]环转化(6:乙醇钠;8 ,9:无水乙酸钠)的报道。改造产品和结构的影响对其形成的光谱数据通过盐的anhydrobases 2,4和5进行了讨论。