Synthesis 2020; 52(06): 928-932
DOI: 10.1055/s-0039-1690809
paper
© Georg Thieme Verlag Stuttgart · New York

Iodobenzene-Catalyzed Oxidative Cyclization for the Synthesis of Highly Functionalized Cyclopropanes

Yang Li
,
Hao Guo
,
Renhua Fan
Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P. R. of China   eMail: rhfan@fudan.edu.cn
› Institutsangaben
Financial support from the National Natural Science Foundation of China (21572033) and the Science and Technology Commission of Shanghai Municipality (19ZR1403400) is greatly appreciated.
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Publikationsverlauf

Received: 22. Dezember 2019

Accepted after revision: 09. Januar 2020

Publikationsdatum:
29. Januar 2020 (online)


Abstract

An iodobenzene-catalyzed oxidative cyclization of Michael adducts of activated methylene compounds with nitroolefins or chalcones is developed. mCPBA is used as oxidant together with Bu4NI for the generation of a highly reactive iodine(III) species to mediate the cyclopropanation via a ligand exchange and reductive elimination process. A range of highly functionalized cyclopropanes are synthesized with high diastereoselectivities.

Supporting Information