2,4-共轭不饱和酮、酯、腈的合成  

Synthesis of 2,4-Conjugated Unsaturated Ketones,Esters and Nitriles

作　　者：钟琦[1] 刘长庆[1] 邵建国[1] 

机构地区：[1]扬州师范学院化学系,江苏扬州225002

出　　处：《有机化学》1991年第1期58-63,共6页Chinese Journal of Organic Chemistry

基　　金：江苏省教委自然科学基金资助课题

摘　　要：前文我们报道了溴化对-苯基苯甲酰甲基二丁基碲、溴化对-溴苯甲酰甲基二丁基碲和溴化间-硝基苯甲酰甲基二丁基碲等碲盐与醛、酮缩合成α,β-不饱和酮的反应。为了进一步研究碲盐反应性能,扩大它在有机合成中应用范围,我们在前期工作基础上,由碲盐和(E)-α,β-不饱和醛合成了2,4-共轭不饱和酮、酯、腈。A convenient procedure for the synthesis of 2,4-conjugated unsaturated ketones,esters and nitriies by the condensation of telluronium salts with α,β-unsaturated aldehydesis reported.The yields are 85～96%.All products are the E,E-isomers as confirmed bytheir m.P.,IR and ~1 H NMR splectra.Effect of solvents and bases on the condensation arestudied.The reaction is likely to proceed with telluronium ylides as intermediates.

关 键 词：石帝盐 不饱和酮 不饱和酯 

分 类 号：O623.524[理学—有机化学]