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  • Title: Synthesis of triarylmethanes by palladium-catalyzed C-H/C-O coupling of oxazoles and diarylmethanol derivatives.
    Author: Tabuchi S, Hirano K, Satoh T, Miura M.
    Journal: J Org Chem; 2014 Jun 20; 79(12):5401-11. PubMed ID: 24912021.
    Abstract:
    A PdCl2(MeCN)2/PPhCy2 catalyst couples oxazoles with diarylmethyl carbonates or pivalates to form the corresponding triarylmethanes in good yields. The catalysis involves successive secondary benzylic sp(3) C-O and heteroaromatic sp(2) C-H cleavages and provides an effective access to heteroarene-containing triarylmethanes from nonhalogenated and nonmetalated starting materials, which is complementary to precedented cross-coupling technologies with organic halides and organometallic reagents.
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