Synthesis 2015; 47(24): 3859-3873
DOI: 10.1055/s-0035-1560267
paper
© Georg Thieme Verlag Stuttgart · New York

3,3′-Diiodobinaphthol and 3,3′-Diiodobiphenol Derivatives as Hypervalent Iodine Organocatalysts for the α-Oxytosylation of Ketones

Simon Brenet
Département de Chimie Moléculaire (SERCO), UMR-5250, ICMG FR-2607, Université Joseph Fourier, 301 Rue de la Chimie, BP 53, 38041 Grenoble Cedex 9, France   eMail: florian.berthiol@ujf-grenoble.fr
,
Clémentine Minozzi
Département de Chimie Moléculaire (SERCO), UMR-5250, ICMG FR-2607, Université Joseph Fourier, 301 Rue de la Chimie, BP 53, 38041 Grenoble Cedex 9, France   eMail: florian.berthiol@ujf-grenoble.fr
,
Bastien Clarens
Département de Chimie Moléculaire (SERCO), UMR-5250, ICMG FR-2607, Université Joseph Fourier, 301 Rue de la Chimie, BP 53, 38041 Grenoble Cedex 9, France   eMail: florian.berthiol@ujf-grenoble.fr
,
Lilia Amiri
Département de Chimie Moléculaire (SERCO), UMR-5250, ICMG FR-2607, Université Joseph Fourier, 301 Rue de la Chimie, BP 53, 38041 Grenoble Cedex 9, France   eMail: florian.berthiol@ujf-grenoble.fr
,
Florian Berthiol*
Département de Chimie Moléculaire (SERCO), UMR-5250, ICMG FR-2607, Université Joseph Fourier, 301 Rue de la Chimie, BP 53, 38041 Grenoble Cedex 9, France   eMail: florian.berthiol@ujf-grenoble.fr
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Publikationsverlauf

Received: 22. Juli 2015

Accepted after revision: 24. August 2015

Publikationsdatum:
17. September 2015 (online)


Abstract

New series of enantiopure 3,3′-diiodobinaphthol- and 3,3′-diiodobiphenol-based molecules have been synthesized and used as chiral hypervalent iodine oxidation organocatalysts in the α-oxytosylation of propiophenone. When we compared these new organocatalysts to our previous series of 3,3′-diiodo-1,1′-binaphthalene-2,2′-diol-fused maleimides, we have made two important observations: the maleimide moiety is the best moiety for obtaining moderate enantioselectivities, and the presence of an aliphatic substituent on the biaryl part of the catalyst enhances the enantioselectivity.