Chiral epoxybutyrates are prepared in high yield from novel dihydro-3R-substituted sulfonyloxy-4R-hydroxy-2-(3H)furanones via based catalyzed alcoholysis. The product chiral epoxy butyrates are useful inter-mediates for the synthesis of 1-carba-1-dethia cephem antibiotics.
新型二氢-3R-取代磺酰氧基-4R-羟基-2-(3H)
呋喃酮在基于催化的醇解作用下可高产制备手性环氧
丁酸酯。生成的手性环氧
丁酸酯是合成 1-carba-1-dethia cephem 抗生素的有用中间体。