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.
sources and 3‐chloroperbenzoic acid (mCPBA) as benign terminal oxidant they catalyze the vicinal diamination of styrenes. The obtained reactivity and selectivity outperform other iodoarene catalyst candidates. This protocol provides a sustainable alternative to previous related protocols for diamination that are based on stoichiometric iodine(III) reagents.