A new general synthetic route to obtain highly functionalized (Z)- and (E)-alk-1-enyl halides is described, where the halogen can be indistinctly F, Cl, Br, and I. The procedure involves CrCl2-promoted reductive elimination of β-O-substituted gem-dihalo alditols easily accessible from carbohydrates. The simplicity and mildness of the reaction conditions and their compatibility with different functional
描述了获得高度官能化的(Z)-和(E)-烷基-1-烯基卤化物的一种新的通用合成路线,其中卤素可能难以区分为F,Cl,Br和I。该过程涉及CrCl 2促进的还原反应消除容易从
碳水化合物中获得的β- O-取代的宝石-二卤代醛糖醇。反应条件的简单性和温和性以及它们与不同官能团的相容性增加了该方法的合成潜力。