derivatives were prepared and subjected to a tin tetrachloride promoted anomeric oxygen to carbon rearrangement. Using this methodology many of the corresponding carbon-linked structures were synthesised, including alkenes and bicyclic ethers, in good yields. On the basis of an isotopic labelling study using 2H incorporated into the side chain and ring system it is proposed that these reactions proceed
制备了多种烯醇
四氢吡喃衍
生物,并使其经受了
四氯化锡促进的异头氧碳重排。使用这种方法,合成了许多相应的碳连接结构,包括烯烃 和双环 醚,收益率很高。基于使用结合到侧链和环系统中的2 H进行的同位素标记研究,建议这些反应通过分子间途径进行。