The methylated diacetate 4, derived from the readily available hydroxamic acid 1, undergoes Pdo catalyzed nucleophilic allylic displacement under conditions which also result in the removal of the chiral auxiliary and its replacement with an easily removed acetyl group.
衍生自易得的异羟
肟酸1的甲基化的二
乙酸4在一定条件下经历Pd o催化的亲核烯丙基取代,这也导致手性助剂的去除并被易于去除的乙酰基取代。