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.
[EN] NOVEL IODINE COMPOUNDS, PROCESSES FOR THEIR PREPARATION AND USE THEREOF AS AMINATION AGENTS<br/>[FR] NOUVEAUX COMPOSÉS D'IODE, PROCÉDÉS POUR LEUR PRÉPARATION ET UTILISATION DE CEUX-CI EN TANT QU'AGENTS D'AMINATION
申请人:FUNDACIO PRIVADA INST CATALA D INVESTIGACIO QUIMICA ICIQ
公开号:WO2012160112A1
公开(公告)日:2012-11-29
The iodine compounds of the present invention corresponds to those of formula (I), wherein R1, R1' and X have several meanings. These iodine compounds gives rise to the amination of several substrates without the need of catalysts, especially metal catalysts, and confer to the amination reaction the further advantage of being performed under mild conditions, which is of interest for industrial-scale production of nitrogenated compounds with pharmaceutical, biological or medicinal applications. Therefore, the iodine compounds of the invention are useful as amination agents. The invention also discloses several processes for the preparation of the iodine compounds of formula (I).
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