Iron(III)-Catalyzed Arylation of Spiro-Epoxyoxindoles with Phenols/Naphthols towards the Synthesis of Spirocyclic Oxindoles
作者:Mupeng Luo、Rongju Yuan、Xuesong Liu、Linqian Yu、Wanguo Wei
DOI:10.1002/chem.201601185
日期:2016.7.4
a tandem Friedel–Crafts‐type arylation and O‐cyclization to yield novel naphthofuranyl‐spirooxindoles in excellent yields. This method is applied to enable the efficient and highly regioselective synthesis of a small‐molecule inhibitor of the sodium channel Nav1.7 (±)‐XEN402, which is currently in a phase IIb clinical trial for the treatment of pain.
开发了一种高效且高度区域选择性的铁(III)催化的螺-环氧氧吲哚与苯酚的Friedel-Crafts型芳基化反应,可快速获得3-(3-吲哚基)-氧吲哚-3-甲醇,可进一步精制为苯并呋喃基在光延条件下的-spirooxindoles。当螺epoxyoxindoles是在的FeCl催化量的存在下与萘反应3 ⋅6ħ 2 Ó在二氯甲烷中,他们经历了一个串联的Friedel-Crafts型芳基化和O-环化以优良产率得到新型naphthofuranyl-spirooxindoles。该方法可用于高效,高度区域选择性地合成钠通道Na v的小分子抑制剂1.7(±)-XEN402,目前处于IIb期临床试验中,用于治疗疼痛。