(+)-jasplakinolide is described. The synthesis of the polyketide template utilized a diastereoselective syn-aldol, ortho-ester Claisen rearrangement followed by efficient conversion to a cyanide. The beta-amino acid unit was constructed in a highly diastereoselective manner utilizing nucleophilic addition to a chiral sulfinimine. Yamaguchi macrocyclization and removal of the protecting group provided
描述了(+)-芥子
油酸酯的对映选择性全合成。聚酮化合物模板的合成利用了非对映选择性的顺式羟醛,原酸酯克莱森重排,然后有效地转化为
氰化物。β-
氨基酸单元以高度非对映选择性的方式利用对手性亚
磺胺的亲核加成而构建。Yamaguchi的大环化和保护基的去除为(+)-jasplakinolide提供了方便的途径。