We recently developed a novel Ir‐catalyzed dynamic kinetic isomerization reaction for Achmatowicz rearrangement products. In this update, we show that products derived from the Achmatowicz rearrangement can also undergo Ir‐catalyzed dynamic kinetic allylic etherification in the presence of an appropriate ligand and additive to afford useful intermediates for the synthesis of carbohydrates. The addition of the triphenyl phosphite ligand shuts down the isomerization pathway and promotes the allylic etherification pathway. The addition of diphenyl phosphate improved the diastereoselectivity for the addition reaction. Interestingly, opposite diastereoselectivity was observed for sterically demanding alcohol nucleophiles compared to less sterically demanding alcohol nucleophiles. The method was also applied to the synthesis of several 2,3‐dideoxypyranosides.

中文翻译：

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Achmatowicz重排产物的铱催化动态动力学立体选择性烯丙基醚化

我们最近为Achmatowicz重排产物开发了一种新型的Ir催化的动态动力学异构化反应。在此更新中，我们表明，在适当的配体和添加剂存在下，源自Achmatowicz重排的产物也可以进行Ir催化的动态动力学烯丙基醚化反应，从而提供用于合成碳水化合物的有用中间体。亚磷酸三苯酯配体的添加关闭了异构化途径并促进了烯丙基醚化途径。磷酸二苯酯的加入改善了加成反应的非对映选择性。有趣的是，与对空间要求较低的醇亲核试剂相比，对空间要求较高的醇亲核试剂观察到相反的非对映选择性。该方法还适用于几种2的合成