An efficient and straightforward approach for the synthesis of C7 site-selective BINOL derivatives has been achieved via cost-effective Co(III)-catalyzed C-H cascade alkenylation/intramolecular Friedel-Crafts alkylation of BINOL units and propargyl cycloalkanols. Under the advantage of the pyrazole directing group, the protocol allows the rapid synthesis of various BINOL-tethered spiro[cyclobutane-1,1'-indenes].
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| http://dx.doi.org/10.1021/acs.joc.3c00537 | DOI Listing |
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