cheminform abstract: synthesis of γ-benzopyranone by tfoh-promoted regioselective cyclization of...

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ChemInform 2012, 43, issue 01 © 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Benzopyran derivatives R 0350 DOI: 10.1002/chin.201201117 Synthesis of γ-Benzopyranone by TfOH-Promoted Regioselective Cyclization of o-Alkynoylphenols. — A number of γ-benzopyranones is available. The cyclization of substrates (III) proceeds with concomitant demethylation to provide the hydroxy analogues (IV). — (YOSHIDA, M.; FUJINO, Y.; DOI*, T.; Org. Lett. 13 (2011) 17, 4526-4529, http://dx.doi.org/10.1021/ol2016934 ; Grad. Sch. Pharm. Sci., Tohoku Univ., Aoba, Sendai 980, Japan; Eng.) — Jannicke 01- 117

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Page 1: ChemInform Abstract: Synthesis of γ-Benzopyranone by TfOH-Promoted Regioselective Cyclization of o-Alkynoylphenols

Benzopyran derivativesR 0350 DOI: 10.1002/chin.201201117

Synthesis of γ-Benzopyranone by TfOH-Promoted Regioselective Cyclization of o-Alkynoylphenols. — A number of γ-benzopyranones is available. The cyclization of substrates (III) proceeds with concomitant demethylation to provide the hydroxy analogues (IV). — (YOSHIDA, M.; FUJINO, Y.; DOI*, T.; Org. Lett. 13 (2011) 17, 4526-4529, http://dx.doi.org/10.1021/ol2016934 ; Grad. Sch. Pharm. Sci., Tohoku Univ., Aoba, Sendai 980, Japan; Eng.) — Jannicke

01- 117

ChemInform 2012, 43, issue 01 © 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

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