Enantioselective Metal-Free Diamination of Styrenes
作者:Caren Röben、José A. Souto、Yolanda González、Anton Lishchynskyi、Kilian Muñiz
DOI:10.1002/anie.201103077
日期:2011.9.26
Metal‐free and asymmetric: The first enantioselectivediamination of styrenes simply requires a chiral hypervalent iodine(III) reagent as an oxidant and bismesylimide as a nitrogen source (see scheme, Ms=methanesulfonyl). The reaction proceeds under mild conditions and with high enantiomeric excess.
An enantioselective catalytic vicinal diamination of styrenes is reported, which proceeds under entirely intermolecular reaction control. It relies on a chirally modified aryliodine(I) catalyst and proceeds within an iodine(I/III) manifold with conventional 3-chloroperbenzoic acid as a terminal oxidant. An environmentally benign solvent combination not only adds to the attractiveness of the process