Beilstein J. Org. Chem.2024,20, 41–51, doi:10.3762/bjoc.20.6
reactive in chloroform solution, while in methanol the corresponding phosphonium phenolate is formed.
Keywords: Lewis-base catalysis; Michael acceptor reactivity; phospha-Michael reaction; phosphoniumphenolatezwitterion; Introduction
Organocatalysis has emerged in recent years as a valuable and
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Graphical Abstract
Scheme 1:
Reaction of 1 with various Michael acceptors (EWG = electron-withdrawing group) forming the zwitter...