Synthesis 2014; 46(09): 1261-1269
DOI: 10.1055/s-0033-1340826
paper
© Georg Thieme Verlag Stuttgart · New York

Asymmetric Synthesis of Functionalized Dihydro- and Tetrahydropyrans via an Organocatalytic Domino Michael–Hemiacetalization Reaction

Gregor Urbanietz
Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany   Fax: +49(241)8092127   eMail: enders@rwth-aachen.de
,
Iuliana Atodiresei
Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany   Fax: +49(241)8092127   eMail: enders@rwth-aachen.de
,
Dieter Enders*
Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany   Fax: +49(241)8092127   eMail: enders@rwth-aachen.de
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Publikationsverlauf

Received: 22. Januar 2014

Accepted: 24. Januar 2014

Publikationsdatum:
18. Februar 2014 (online)


Abstract

Starting from α-hydroxymethyl nitroalkenes and various 1,3-dicarbonyl compounds, a one-pot organocatalyzed diastereo- and enantioselective synthesis of polyfunctionalized dihydro- and tetrahydropyran derivatives via a domino Michael-hemiacetalization sequence is reported. The title compounds bearing a variety of functional groups can be synthesized in this way in good yields (59–91%) and with moderate to excellent diastereoselectivities (26–98% de) and enantioselectivities (71–99% ee).

Supporting Information