Computational Mechanistic Study on Intramolecular Triple Cyclization of 1-Biphenylethynyl-2-phenylethynylbenzenes Giving Spiro Fluorene-Phenylenevinylenes by Dual Catalysis
Abstract:Cationic Au(I) complex-catalyzed double cyclizations of 1,2-dialkynylbenzene derivatives are valuable for the straightforward synthesis of ladder-type π-conjugated compounds. We have previously developed a method for synthesizing ladder-type π-conjugated molecules with spiro skeleton (spiro fluorene-phenylene vinylenes) by the triple cyclization of 1-biphenylethynyl-2-phenylethynylbenzenes using an AuCl(SMe2)/tBuXPhos/AgNTf2 catalyst system. Experimental mechanistic studies revealed that an Ag(I) complex or HN… Show more
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