Halaczkiewicz M, Maraj A, Kelm H, Manolikakes G. Brønsted Acid-Catalyzed Diastereoselective Synthesis of Spiroisoindolinones from Enamides.
Org Lett 2024;
26:2321-2325. [PMID:
38467018 DOI:
10.1021/acs.orglett.4c00661]
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Abstract
A highly diastereoselective synthesis of spiroisoindolinones from enamides and 3-hydroxy-isoindolinones is reported. The reaction proceeds rapidly in the presence of p-toluenesulfonic acid as a Brønsted acid catalyst and affords a variety of densely substituted spiroisoindolinones with three contiguous stereogenic centers in high yields (≤98%) and diastereoselectivities (up to dr >98:<2:0:0).
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