Synthesis of Substrates for Aldolase-Catalysed Reactions: A Comparison of Methods for the Synthesis of Substituted Phenylacetaldehydes
作者:Derar Al-Smadi、Thilak Enugala、Thomas Norberg、Jan Kihlberg、Mikael Widersten
DOI:10.1055/s-0036-1591963
日期:2018.6
Methods for the synthesis of phenylacetaldehydes (oxidation, one-carbon chain extension) were compared by using the synthesis of 4-methoxyphenylacetaldehyde as a model example. Oxidations of 4-methoxyphenylethanol with activated DMSO (Swern oxidation) or manganese dioxide gave unsatisfactory results; whereas oxidation with 2-iodoxybenzoic acid (IBX) produced 4-methoxyphenylacetaldehyde in reasonable
以4-甲氧基苯乙醛的合成为例,比较了苯乙醛的合成方法(氧化、单碳链延长)。用活化的 DMSO(Swern 氧化)或二氧化锰氧化 4-甲氧基苯基乙醇的结果不令人满意;而用 2-碘氧基苯甲酸 (IBX) 氧化以合理 (75%) 的产率生成 4-甲氧基苯基乙醛。然而,用甲氧基亚甲基-三苯基膦进行 Wittig 型单碳链扩展,然后水解,从 4-甲氧基苯甲醛(一种廉价的起始材料)得到 4-甲氧基苯乙醛的产率非常高(总产率为 81%)。该方法随后被用于合成一组 10 种取代的苯乙醛,收率非常好。