whose syntheses are known in rather lengthy procedures. Herein palladium‐catalyzed cross‐couplings of O‐peracylated 2,6‐anhydro‐aldose tosylhydrazones with benzyl bromides were studied under thermic conditions in the presence of LiOtBu. The reactions gave the corresponding C‐glycopyranosyl styrenes in up to 59% yields. The transformations represent a new, short synthetic sequence to get this type of glycomimetic
C- Glycopyranosyl
苯乙烯类化合物是有价值的合成中间体,其合成过程相当冗长。本文在LiO t Bu存在的条件下,在热条件下研究了O-超酰化的2,6-脱
水脱
水醛糖
甲苯磺酰
肼与苄基
溴的
钯催化交叉偶联。反应以高达59%的收率得到了相应的C- glycopyranosyl
苯乙烯。转化代表了一个新的短合成序列,可从游离醛糖中以4–5个步骤获得这种类型的拟糖化合物。