Enantioselective Synthesis of Phthalides and Isochromanones via Heck-Matsuda Arylation of Dihydrofurans
作者:Shivashankar Kattela、Emilio C. de Lucca、Carlos Roque D. Correia
DOI:10.1002/chem.201804958
日期:2018.12.3
In this communication, the enantioselective synthesis of phthalides and isochromanones is described through a new palladium‐catalyzed Heck–Matsuda arylation/NaBH4‐reduction/lactonization sequence of 2,3‐ and 2,5‐dihydrofurans in good overall yields and excellent enantioselectivities (up to 98:2 er). This expeditious synthesis of chiral Heck lactol intermediates allowed the diversification of the strategy
在本文中,通过新型钯催化的2,3-和2,5-二氢呋喃的Heck-Matsuda芳基化/ NaBH 4还原/内酯化序列描述了邻苯二甲酸酯和异色酮的对映选择性合成,具有良好的总收率和出色的对映选择性(高达98:2 er)。这种快速合成的手性Heck乳糖醇中间体使该策略得以多样化,从而获得了与医学相关的手性内酯,胺和烯烃。分三步获得天然产物3-丁基邻苯二甲酸酯,在98:2 er中的总产率为33%。