Diverse synthesis of the C ring fragment of bryostatins via Zn/Cu-promoted conjugate addition of α-hydroxy iodide with enone
作者:Zhiwen Chu、Ruiqi Tong、Yufan Yang、Xuanyi Song、Tian bao Hu、Yu Fan、Chen Zhao、Lu Gao、Zhenlei Song
DOI:10.1016/j.cclet.2020.11.039
日期:2021.1
precursors for constructing the C ring of bryostatins, has been developed via a Zn/Cu-promoted conjugate addition of α-hydroxy iodides with enones. The reaction leads to direct formation of the C21-C22 bond and tolerates diverse functionalities at the C17-, C18- and C24-positions. The approach also enables a more concise synthesis of the known C ring intermediate (10 longest linear steps and 14 total
摘要通过锌/铜促进的α-羟基碘化物与烯酮的共轭加成,开发了一种收敛方法,即1,5-羟基酮,这是构建bryostatins C环的一般前体。该反应导致C21-C22键的直接形成,并容许在C17-,C18-和C24-位的多种官能度。该方法还可以更精确地合成已知的C环中间体(10个最长线性步骤和14个总步骤),而在我们的苔藓抑素8的总合成中,它以前的合成方法(17个最长线性步骤和22个总步骤)相反。