A new synthesis of 3-fluoro-and 3-chlorocyclobutenes from dihalocyclobutanes. The five isomers of chlorofluorocyclobutane

NC Craig, SS Borick, MA Fisher, TR Tucker…

Index: Craig, Norman C.; Borick, Steven S.; Fisher, Michael A.; Tucker, Thomas R.; Xiao, Yong-Zhuang Journal of Fluorine Chemistry, 1992 , vol. 59, # 2 p. 215 - 224

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Abstract

Abstract 3-Fluorocyclobutene (1) and 3-chlorocyclobutene (2) have been obtained by simpler syntheses and in higher yield than previously reported. One of the synthetic steps involves a three-phase-transfer-catalysis technique that could be of wider utility. New examples are cited of applying AgF 2, an underutilized reagent, as a fluorinating agent near room temperature. Compounds 1 and 2 have been characterized by mass, NMR and ...

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