Catalytic Enantioselective Aminopalladation–Heck Cascade
Domino processes initiated by intramolecular nucleopalladation of alkynes have been developed into powerful synthetic tools for the synthesis of functionalized heterocycles. However, a catalytic enantioselective version of this class of reactions remains scarce. We report herein that reaction of 2-alkynylanilines with prochiral cyclopentenes in the presence of a catalytic amount of Pd(OAc)2, a chiral bidentate pyrox ligand and O2 as terminal oxidant affords the structurally diverse indole-cyclopentene conjugates bearing two stereocenters in a highly diastereo- and enantio-selective manner. One of the products is converted to a heavily functionalized tetracyclic indolinone derivative.
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He, Y.-P., Cao, J., Wu, H., Wang, Q., & Zhu, J. (2021). Catalytic Enantioselective Aminopalladation–Heck Cascade. Angewandte Chemie International Edition, 60(13), 7093–7097. https://doi.org/10.1002/anie.202016001
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2021
60
13
7093
7097
REVIEWED
EPFL