Detail of "13455-12-4"

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PtBr2-Catalyzed consecutive enyne metathesis-aromatization of 1-(1-methoxy-but-3-enyl)-2-(1-alkynyl)benzenes: Dual role of the Pt catalyst

PtBr2-Catalyzed consecutive enyne metathesis-aromatization of 1-(1-methoxy-but-3-enyl)-2-(1-alkynyl)benzenes: Dual role of the Pt catalyst. Bajracharya, Gan B.; Nakamura, Itaru; Yamamoto, Yoshinori ( Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan). Journal of Organic Chemistry, 70(3), 892-897 (English) 2005 American Chemical Society.Except for chemicals metioned above, 13455-12-4 is also used. CODEN: JOCEAH. ISSN: 0022-3263. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) 1,7-Enynes, connected through an arom. ring and bearing a leaving methoxy group at the 4-position, underwent the PtBr2-catalyzed enyne metathesis followed by aromatization in one pot to afford vinylnaphthalenes, e.g., I, in good yields. The cyclobutene intermediate and another intermediate were isolated, indicating that PtBr2 acted as a dual role catalyst. Platinum acted as a transition metal catalyst where it induced the enyne metathesis to produce the cyclobutene starting from the enyne, and then as a Lewis acid catalyst, where it facilitated elimination of MeOH to give the aromatized product. .