Reactions of Diphenyl (phenylethynyl) selenonium Salts with Active Methylene Compounds and Amides: First Isolation of Oxyselenuranes [10-Se-4 (C3O)] as a …

…, K Yamamoto, M Yoshimatsu, G Tanabe…

Index: Kataoka, Tadashi; Watanabe, Shin-Ichi; Yamamoto, Keiichirou; Yoshimatsu, Mitsuhiro; Tanabe, Genzoh; Muraoka, Osamu Journal of Organic Chemistry, 1998 , vol. 63, # 18 p. 6382 - 6386

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Citation Number: 28

Abstract

The reaction of the diphenyl (phenylethynyl) selenonium triflate 1a with active methylene compounds 5 and t-BuOK in THF gave furan derivatives 6. The [10-Se-4 (C3O)] selenuranes 8a and 8b could be isolated from the reactions with benzoylacetonitrile 5f and with 1, 3- indandione 5g, respectively, as reaction intermediates. The structures of the selenuranes 8 were elucidated by X-ray crystallography and 77Se high-resolution solid-state NMR ...