Synthesis 2016; 48(19): 3413-3419
DOI: 10.1055/s-0035-1562785
paper
© Georg Thieme Verlag Stuttgart · New York

Highly Diastereoselective and Irreversible Aldol Reactions of N-Sulfonylimidates

Hannah E. Bartrum
a   Univ. Grenoble Alpes, Département de Chimie Moléculaire (DCM), 38000 Grenoble, France
b   CNRS, Département de Chimie Moléculaire (DCM), 38000 Grenoble, France   eMail: jean-francois.poisson@univ-grenoble-alpes.fr
,
Sébastien Carret
a   Univ. Grenoble Alpes, Département de Chimie Moléculaire (DCM), 38000 Grenoble, France
b   CNRS, Département de Chimie Moléculaire (DCM), 38000 Grenoble, France   eMail: jean-francois.poisson@univ-grenoble-alpes.fr
,
Jean-François Poisson*
a   Univ. Grenoble Alpes, Département de Chimie Moléculaire (DCM), 38000 Grenoble, France
b   CNRS, Département de Chimie Moléculaire (DCM), 38000 Grenoble, France   eMail: jean-francois.poisson@univ-grenoble-alpes.fr
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Publikationsverlauf

Received: 26. Mai 2016

Accepted after revision: 29. Juni 2016

Publikationsdatum:
30. August 2016 (online)


Dedicated to the memory of Prof. Jean Normant, an exceptional and inspiring supervisor

Abstract

A mild method for the aldolization of N-sulfonylimidates was developed. The reaction proceeds in excellent diastereoselectivity to provide a range of useful β-hydroxyimidates in high yield. The innate reversibility of the reaction is suppressed by the use of a titanium complex as a Lewis acid.

Supporting Information

 
  • References

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  • 4 Massa A, Utsumi N, Barbas CF. Tetrahedron Lett. 2009; 50: 145
  • 5 Bartrum HE, Viceriat A, Carret S, Poisson J.-F. Org. Lett. 2014; 16: 1972
  • 7 McElvain SM, Venerable JT. J. Am. Chem. Soc. 1950; 72: 1661
  • 8 Reaction of 1a under analogous conditions to those utilized by Kobayashi for the Mannich-type reaction3 resulted in complete recovery of the starting material.
  • 9 Treatment of product 2a with triethylamine in dichloromethane at room temperature resulted in complete retro-aldolization yielding the starting material N-sulfonylimidate 1a and benzaldehyde.
  • 10 CCDC 1481884 contains the supplementary crystallographic data for this paper. The data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/getstructures. The ORTEP representation is included in the Supporting Information.
  • 11 This procedure is adapted from: Reetz MT, Westermann J, Steinbach R, Wenderoth B, Peter R, Ostarek R, Maus S. Chem. Ber. 1985; 118: 1421