4.8 Article

W(CO)5-amine catalyzed exo- and endo-selective cyclizations of ω-alkynyl silyl enol ethers:: A highly useful method for the construction of polycyclic compounds

Journal

ORGANIC LETTERS
Volume 4, Issue 15, Pages 2569-2571

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ol026202c

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[GRAPHICS] A highly useful method for the construction of polycyclic compounds based on the amine-controlled exo- and endo-selective cyclizations of omega-alkynyl silyl enol ethers catalyzed by W(CO)(5)(L) is reported. When bis-alkynyl silyl enol ethers were treated with a catalytic amount of W(CO)(6), DABCO, and water under photoirradiation, synthetically useful tricyclic ketones were obtained in good yield.

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