Reaction of α,β-unsaturated aldehydes with hydrogen peroxide catalysed by benzeneseleninic acids and their precursors
作者:Ludwik Syper
DOI:10.1016/s0040-4020(01)86890-3
日期:1987.1
Oxidation of α,β-unsaturated aldehydes with hydrogen peroxide catalysed by benzeneseleninic acids and their precursors has been investigated. Bis 2-nitrophenyl diselenide has proved to be the most effective catalyst. The major products resulting from the oxidation are vinyl formates (a) which on hydrolysis give saturated aldehydes or ketones (g) having the carbon chain shortened by one carbon atom
研究了苯硒酸及其前体催化的过氧化氢对α,β-不饱和醛的氧化作用。已证明双2-硝基苯基二硒化物是最有效的催化剂。氧化产生的主要产物是乙烯基甲酸酯(a),与起始的醛相比,乙烯基甲酸酯(a)在水解时得到饱和的醛或酮(g),其碳链缩短了一个碳原子。次要产物是甲氧基氧肟酮(b),α-羟基羰基(e)和α-甲氧基羰基(f)化合物,其碳链缩短了一个碳原子。也已经分离出正式衍生自碳-碳双键的氧化裂变的羰基化合物d。当肉桂醛(4)或1-苯基-2-甲酰氧基丙烷(5a)分别被氧化时,已分离出二甲酰氧基(4c)和甲酰氧基乙酰氧基苯基甲烷(5c)。讨论了这些产物形成的可能机理。当α,β-不饱和醛被有机过氧酸氧化时,得到类似的产物。