Lewis Acid-Catalyzed [3 + 2]-Cyclization of Iodonium Ylides with Azadienes: Access to Spiro[benzofuran-2,2'-furan]-3-ones.
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DOI: 10.1021/acs.orglett.2c02660
Abstract: A highly regioselective synthesis of spiro[benzofuran-2,2'-furan]-3-ones has been explored via Lewis acid-catalyzed [3 + 2] cyclization of iodonium ylides with azadienes. The acidity of the Lewis acid was significantly strengthened with strong hydrogen bond donors,… read more here.
Keywords: lewis acid; spiro benzofuran; benzofuran furan; iodonium ylides ... See more keywords