azetidinone through the Reformatsky-type reaction and an introduction of a glycine moiety. The construction of the functionalized pyrrolidine ring was executed by a one-pot sequential elimination-Michael addition protocol of a beta-amino-delta-lactone intermediate with high diastereoselectivity.
描述了从可商购的
2-氮杂环丁酮开始的(-)-
海藻酸的全合成。关键的δ-内酯中间体是通过Reformatsky型反应和引入甘
氨酸部分,由市售的氮杂
环丁酮简明地制备的。通过具有高非对映选择性的β-
氨基-δ-内酯中间体的一锅顺序消除-迈克尔加成方案来进行官能化
吡咯烷环的构建。