[Rh(cod)(2)]BF(4), serves as an effective catalyst for asymmetric isomerizations of allylic alcohols to aldehydes, furnishing improved yields, scope, and enantioselectivities relative to previously reported methods. The catalyst is air-stable and can be recovered at the end of the reaction. Mechanistic studies establish that the isomerization proceeds via an intramolecular 1,3-hydrogen migration and that
合成了一种新的平面手性双齿
磷酸二茂铁配体(2)并对其结构进行了表征。衍生的
铑配合物[Rh(cod)(2)] BF(4)可作为有效的催化剂,用于烯丙基醇向醛的不对称异构化,相对于先前报道的方法,可提供更高的收率,范围和对映选择性。该催化剂是空气稳定的,并且可以在反应结束时回收。机理研究表明,异构化是通过分子内的1,3-氢迁移进行的,并且催化剂区分了对映体C1氢。