Synthesis 2019; 51(22): 4198-4204
DOI: 10.1055/s-0039-1690484
paper
© Georg Thieme Verlag Stuttgart · New York

Asymmetric Organocatalytic Michael Addition–Cyclisation Cascade of Cyclopentane-1,2-dione with Alkylidene Malononitriles

Estelle Silm
,
Sandra Kaabel
,
Ivar Järving
,
Tõnis Kanger
Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia   Email: tonis.kanger@taltech.ee
› Author Affiliations
The authors thank the Estonian Ministry of Education and Research (Haridus- ja Teadusministeerium grant nos. IUT 19-32, IUT 19-9, and PUT 1468) and the Centre of Excellence in Molecular Cell Engineering (2014-2020.4.01.15-0013) for financial support.
Further Information

Publication History

Received: 15 May 2019

Accepted after revision: 27 June 2019

Publication Date:
11 July 2019 (online)


Abstract

An asymmetric organocatalytic cascade reaction between cyclopentane-1,2-diones and alkylidene malononitriles affords highly substituted 4H-pyrans in moderate to high enantiomeric excess. The selective reduction of a bridged double bond leads to the formation of cis-substituted cyclopentanone with three contiguous stereogenic centres.

Supporting Information