Chiral Bis(oxazolidine)pyridine–Copper-Catalyzed Enantioselective Friedel–Crafts Alkylation of Indoles with Nitroalkenes
作者:Takayoshi Arai、Toru Sato
DOI:10.1055/s-0033-1340311
日期:——
asymmetric Friedel–Crafts reaction of indoles with nitroalkenes was catalyzed by the stereochemically tunable bis(oxazolidine)pyridine (PyBodine)–Cu(OTf)2 complex. Using the PyBodine(Val)–Cu(OTf)2 catalyst gave the Friedel–Crafts adducts with highly enantioselective manner. For the 1,4-bis[(E)-2-nitrovinyl]benzene, the reaction proceeded in a meso-trick manner to give the chiral double Friedel–Crafts adduct
吲哚与硝基烯烃的催化不对称 Friedel-Crafts 反应由立体化学可调的双(恶唑烷)吡啶(PyBodine)-Cu(OTf)2 络合物催化。使用 PyBodine(Val)-Cu(OTf)2 催化剂以高度对映选择性的方式生成 Friedel-Crafts 加合物。对于 1,4-双[(E)-2-硝基乙烯基]苯,反应以细观技巧进行,得到对映体过量 97% 的手性双弗里德尔-克拉夫茨加合物。