The preparation of magnesium benzyl fluoromalonate and other equivalent materials, the synthetic equivalents of the --CH.sub.2 F moiety, is described. Reaction between these reagents and the in situ-formed imidazolides of various carboxylic acids gives beta-keto-alpha-fluoroesters, which upon hydrogenation and spontaneous decarboxylation yields fluoromethyl ketones in excellent yields. The overall transformation from RCOOH to RCOCH.sub.2 F is thus illustrated.
本文介绍了制备苯甲基
氟丙酸镁和其他等效材料,这些材料是--CH.sub.2 F基团的合成等效物。这些试剂与各种
羧酸的原位形成的
咪唑酰亚胺反应,形成β-酮-α-
氟酯,经过氢化和自发脱羧反应,可以得到产率极高的
氟甲基酮。因此,从RCOOH到RCOCH.sub.2 F的整个转化过程得到了说明。