Russian journal of organic chemistry

New Fluoroaryl-containing β, β'-Dioxoesters in the Synthesis of Fluorobenzopyran-2 (4)-ones

YV Burgart, VI Saloutin

Index: Kisil'; Burgart; Saloutin Russian Journal of Organic Chemistry, 2001 , vol. 37, # 10 p. 1455 - 1462

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Citation Number: 2

Abstract

Abstract For the first time were obtained ethyl 2-(2-methoxy-3, 4, 5, 6-tetrafluorobenzoyl)-3- oxobutanoate and ethyl 2-pentafluorobenzoyl-3-oxobutanoate and their copper chelates. The compounds were prepared by acylation of ethyl acetoacetate with 2-methoxy-3, 4, 5, 6- tetrafluoro-and pentafluorobenzoyl chlorides. Cyclization of these β, β'-dioxoesters afforded substituted chromones. 2-Methyl-5-methoxy-6, 7, 8-trifluoro-3-ethoxycarbonylchromone ...