An Approach to the Regioselective Diamination of Conjugated Di- and Trienes
作者:Anton Lishchynskyi、Kilian Muñiz
DOI:10.1002/chem.201103435
日期:2012.2.20
It's do or diaminate: The selective diamination of 1,3‐butadienes in the presence of hypervalent iodine reagents has been developed. This oxidation process proceeds with complete selectivity in favor of diamination. Depending on the substrate, it proceeds either with 1,2‐ or 1,4‐regioselectivity (see scheme).
Metal-Free Iodine(III)-Promoted Direct Intermolecular C–H Amination Reactions of Acetylenes
作者:José A. Souto、Peter Becker、Álvaro Iglesias、Kilian Muñiz
DOI:10.1021/ja306211q
日期:2012.9.19
A direct metal-free amination of arylalkynes has been developed, which proceeds by reaction of the terminal alkyne with the hypervalent iodine reagent PhI(OAc)NTs(2) within a single-step operation. This unprecedented intermolecular C-H to C-N bond conversion provides rapid access to the important class of ynamides. In addition to the title reaction, the related transformation between alkylated alkynes
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.
Defined Hypervalent Iodine(III) Reagents Incorporating Transferable Nitrogen Groups: Nucleophilic Amination through Electrophilic Activation
作者:José A. Souto、Claudio Martínez、Irene Velilla、Kilian Muñiz
DOI:10.1002/anie.201206420
日期:2013.1.21
Only I and N: Hypervalent iodine(III) reagents with two reactive IN single bonds have been isolated for the first time. Their solid‐state and solution structures provide evidence for enhanced electrophilicity at iodine and nucleophilic character of the imine. As a result, improved reactivity in amination reactions and unprecedented nitrogen‐transfer reactions under metal‐free conditions are realized
acids mediated by hypervalentiodine(III) reagents is described. The decarboxylative C–O bond forming reaction proceeded in the presence of PhI(OAc)2 to give the corresponding allylic acetates. In addition, decarboxylative C–N bond formation was achieved by utilizing hypervalentiodine(III) reagents containing an I–N bond. Mechanistic studies suggest the unique reactivity of hypervalentiodine reagents