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  • Title: In(III)/PhCO2H binary acid catalyzed tandem [2 + 2] cycloaddition and Nazarov reaction between alkynes and acetals.
    Author: Zhu L, Xi ZG, Lv J, Luo S.
    Journal: Org Lett; 2013 Sep 06; 15(17):4496-9. PubMed ID: 23947688.
    Abstract:
    A facile tandem [2 + 2] cycloaddition and Nazarov reaction has been developed. The combination of In(OTf)3 and benzoic acid was found to synergistically promote the coupling of alkynes and acetals to form 2,3-disubstituted indanones in excellent yield and diastereoselectivity.
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