Cascade Synthesis of Five-Membered Lactones using Biomass-Derived Sugars as Carbon Nucleophiles
作者:Sho Yamaguchi、Takeaki Matsuo、Ken Motokura、Akimitsu Miyaji、Toshihide Baba
DOI:10.1002/asia.201600307
日期:2016.6.6
We report the cascade synthesis of five‐membered lactones from a biomass‐derived triose sugar, 1,3‐dihydroxyacetone, and various aldehydes. This achievement provides a new synthetic strategy to generate a wide range of valuable compounds from a single biomass‐derived sugar. Among several examined Lewis acid catalysts, homogeneous tin chloride catalysts exhibited the best performance to form carbon–carbon
我们报道了从生物质衍生的三糖,1,3-二羟基丙酮和各种醛类中五元内酯的级联合成。这项成就提供了一种新的合成策略,可以从一种生物质衍生的糖中产生多种有价值的化合物。在几种经过检验的路易斯酸催化剂中,均相氯化锡催化剂表现出形成碳-碳键的最佳性能。研究了使用醛类化合物合成五元内酯的范围和局限性。级联反应导致高产物选择性和非对映选择性,并基于异构化实验和密度泛函理论(DFT)计算,讨论了导致非对映选择性的机理。