The First Formation of (1Z)??1??Alkylidene??1H??isobenzofuranium Amides and 1H??Inden??1??ones: Acid??Promoted 5??exo Cyclization and Hydration/Aldol Condensation …

…, T Ogawa, S Nishijima, D Motomatsu…

文献索引：Nagahora, Noriyoshi; Wasano, Tatsuya; Nozaki, Kazuhiro; Ogawa, Tamaki; Nishijima, Shuhei; Motomatsu, Daiki; Shioji, Kosei; Okuma, Kentaro European Journal of Organic Chemistry, 2014 , vol. 2014, # 7 p. 1423 - 1430

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被引用次数: 1

摘要

Abstract (1Z)-1-(2, 2-Dimethylpropylidene)-1H-isobenzofuranium bis (trifluoromethylsulfonyl) amides were synthesized through 5-exo cyclization reactions between sterically encumbered o-alkynylbenzophenones and bis (trifluoromethylsulfonyl) imide (Tf 2 NH). It was confirmed that the five-membered-ring isobenzofuranium amide isomerized to give the corresponding benzopyrylium amide, the six-membered-ring framework compound, in ...