Synergistic catalysis for cascade allylation and 2-aza-cope rearrangement of azomethine ylides

Liang Wei, Qiao Zhu, Lu Xiao, Hai-Yan Tao and Chun-Jiang Wang ()
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Liang Wei: Wuhan University
Qiao Zhu: Wuhan University
Lu Xiao: Wuhan University
Hai-Yan Tao: Wuhan University
Chun-Jiang Wang: Wuhan University

Nature Communications, 2019, vol. 10, issue 1, 1-12

Abstract: Abstract The efficient construction of enantiomerically enriched molecules from simple starting materials via catalytic asymmetric synthesis strategies is a key challenge in synthetic chemistry. Metallated azomethine ylides are commonly-used synthons for the preparation of N-heterocycles and α-amino acids. Remarkably, to date, the utilization of azomethine ylides for the facile access to chiral amines has proven elusive. Here, we report that a synergistic Cu/Ir-catalytic system combined with careful tuning of the steric congestion can be used to convert aldimine esters to a variety of chiral homoallylic amines via a cascade allylation/2-aza-Cope rearrangement. The elucidation of the distinct effects of each stereogenic center of the allylation intermediates on the stereochemical outcome and chirality transfer in the rearrangement further guided the selection of catalysts combination.

Date: 2019
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DOI: 10.1038/s41467-019-09563-6

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