Beilstein J. Org. Chem.2021,17, 2287–2294, doi:10.3762/bjoc.17.146
synthesis of a potent CRTH2 receptor antagonist.
Keywords: alkylation; base-free; cinchona alkaloids; CRTH2antagonist; hydrogen-bonding; oxindole; phase-transfer catalysis; Introduction
The 2-oxindole scaffold is an important motif present in a myriad of natural products. Among 2-oxidole derivatives, 3,3
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Graphical Abstract
Figure 1:
The importance of the 3,3-spirooxindole core and its access through enantioselective enolate alkyla...