Synthesis 2016; 48(24): 4451-4458
DOI: 10.1055/s-0035-1562522
paper
Georg Thieme Verlag Stuttgart · New York

Asymmetric Organocatalytic Synthesis of 4-Aminoisochromanones via a Direct One-Pot Intramolecular Mannich Reaction

Fabrizio Vetica
a   Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany   Email: enders@rwth-aachen.de
,
Jeanne Fronert
a   Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany   Email: enders@rwth-aachen.de
,
Rakesh Puttreddy
b   Department of Chemistry, Nanoscience Center, University of Jyväskylä, 40014 Jyväskylä, Finland
,
Kari Rissanen
b   Department of Chemistry, Nanoscience Center, University of Jyväskylä, 40014 Jyväskylä, Finland
,
Dieter Enders*
a   Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany   Email: enders@rwth-aachen.de
› Author Affiliations
Further Information

Publication History

Received: 01 July 2016

Accepted: 05 July 2016

Publication Date:
16 August 2016 (online)


Abstract

A highly stereoselective one-pot intramolecular Mannich reaction using 2-oxopropyl-2-formylbenzoates and anilines as substrates, catalyzed by a secondary amine, has been developed. The procedure leads to a new class of 4-aminoisochromanones bearing two adjacent stereocentres in good yields (up to 85%) with excellent cis-stereoselectivities (dr up to 99:1) and ee values of 92–99%.

Supporting Information