The 15-membered cyclic depsipeptide boholamide A and an epimer were prepared by total synthesis for the first time, thus leading to a revision of C6 stereochemistry in the originally proposed structure of natural boholamide A. This convergent route features achievement of a macro-lactamization step in a gram scale. The revised boholamide A was sythesized with 16 linear steps in 5.46% overall yield
首次通过全合成制备了15元环状缩肽boholamide A和差向异构体,从而对最初提出的
天然boholamide A结构中的C6立体
化学进行了修正。该收敛路线的特点是实现了大环内
酰胺化步骤以克为单位。修改后的 boholamide A 用 16 个线性步骤合成,总产率为 5.46%。这项工作促进了 boholamide A 作为潜在缺
氧选择性抗癌剂的研究。