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- W2013460319 abstract "Pyrylium Compounds. 31. Reaction of 3-Alkyl-2,4,6-triarylpyrylium Salts with 1,3-Diketonates: A Method for the Preparation of 3-Acylsubstituted BenzophenonesReaction of 3-alkyl-2,4,6-triarylpyrylium salts with 1,3-diketones in the presence of one equivalent of triethylamine or potassium tert-butoxide does not lead — as originally suspected — to the primary adducts of 2H-pyran structure 6, but to the open-chain valence isomers 7. Treatment of the latter with one equivalent of tert-butoxide in tert-butyl alcohol gives the same 3-alkyl-2,4,6-triarylacetophenones 9 which are obtained directly from 5, 1,3-diketones and two equivalents of potassium tert-butoxide. However, on treating 7 with aqueous ethanolic sodium hydroxide 3-acylsubstituted benzophenones 10 are formed in good yields. The reaction sequence 5710 can also be performed through a one-pot-procedure. — The i.r., u.v., n.m.r. and mass spectroscopic data of the novel products 7, 9, and 10 are reported." @default.
- W2013460319 created "2016-06-24" @default.
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- W2013460319 date "1986-01-01" @default.
- W2013460319 modified "2023-09-27" @default.
- W2013460319 title "Pyryliumverbindungen. 31 [1]. Reaktion 3-alkylsubstituierter 2,4,6-Triaryl-pyryliumsalze mit 1,3-Diketonaten: Ein Weg zur Darstellung 3-acylsubstituierter Benzophenone" @default.
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- W2013460319 doi "https://doi.org/10.1002/prac.19863280310" @default.
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