Preparation of 3-substituted and 2,3-disubstituted-4,4,4-trifluoro-2-butenoic acids—Perkin condensation of activated aromatic ketones
作者:Szabolcs Cserényi、Károly Felföldi、Peter Forgo、István Pálinkó
DOI:10.1016/j.jfluchem.2006.03.004
日期:2006.7
activated aromatic ketones (2,2,2-trifluoroacetophenone and its 4′-phenyl-derivative) with various condensing agents (acetic anhydride, propionic anhydride, phenylacetic acid/acetic anhydride) gives the title compounds in good or moderate yields, and high E-stereoselectivity. For some derivatives an appreciable amount of the Z isomer was also formed. Several of the resulting butenoic acids and their
活化的芳族酮(2,2,2-三氟苯乙酮及其4'-苯基衍生物)与各种缩合剂(乙酸酐,丙酸酐,苯乙酸/乙酸酐)的珀金反应使标题化合物好或中等收率高,E-立体选择性高。对于某些衍生物,还形成了可观量的Z异构体。首次合成了几种所得的丁烯酸及其甲酯。