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Construction of Quaternary Stereogenic Carbon Centers through Copper‐Catalyzed Enantioselective Allylic Alkylation of Azoles
Authors:Prof Dr Hirohisa Ohmiya  Heng Zhang  Saori Shibata  Ayumi Harada  Prof Dr Masaya Sawamura
Institution:1. Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Japan;2. http://wwwchem.sci.hokudai.ac.jp/~orgmet/index.php
Abstract:Copper‐catalyzed enantioselective allylic alkylation of azoles with γ,γ‐disubstituted primary allylic phosphates was achieved using a new chiral N‐heterocyclic carbene ligand bearing a naphtholic hydroxy group. This reaction occurred with excellent branch regioselectivity and high enantioselectivity, thus forming a controlled all‐carbon quaternary stereogenic center at the position α to the heteroaromatic ring.
Keywords:allylic compounds  asymmetric catalysis  carbenes  copper  heterocycles
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