Novel 3-substituted derivatives of 2,2-dimethyl-5-substituted phenoxy-pentanoic acids of formula (I) are prepared. These compouds are prepared from 2,2-dimethyl-5-substituted phenoxy-3-hydroxy-pentanoic acid-.beta.-lactones (formula II). The .beta.-lactones are prepared by condensing relevant phenoxypropanals with dimethylketene.
制备了式(I)的2,2-二甲基-5-取代苯氧基-
戊酸的新型3-取代衍
生物。这些化合物是从2,2-二甲基-5-取代苯氧基-3-羟基-
戊酸-β-内酯(式II)制备的。β-内酯是通过将相关的苯氧基
丙醛与
二甲基乙烯酮缩合制备的。