Selective [5,5]-Sigmatropic Rearrangement by Assembly of Aryl Sulfoxides with Allyl Nitriles

Angewandte Chemie
Lei ZhangBo Peng

Abstract

Aromatic [5,5]-sigmatropic rearrangement is an appealing protocol for accessing 1,4-substituted arenes. However, such a protocol has not been well utilized in organic synthesis because of the difficulties in the synthesis of the substrates, selectivity issues, and limited substrate scope. Described herein is a new [5,5]-sigmatropic reaction utilizing readily available aryl sulfoxides and allyl nitriles. This reaction features mild reaction conditions, high chemo- and regioselectivity, excellent functional-group compatibility, and broad substrate scope. Computational studies suggest that the success of the reaction can be attributed to the selective electrophilic assembly of the rearrangement precursors, in which a linear -C=C=N- linkage favors [5,5]-sigmatropic rearrangement over the competitive [3,3]-sigmatropic rearrangement.

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Citations

Sep 7, 2019·Chemistry : a European Journal·Tomoyuki YanagiHideki Yorimitsu
Apr 16, 2020·Chemical Communications : Chem Comm·Akihiro KobayashiSuguru Yoshida
Mar 14, 2020·Journal of the American Chemical Society·Junsong TianBo Peng
Jan 15, 2020·Chemical Science·Zhen HeDavid J Procter

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