作者:Robert L. Broadrup、Hema M. Sundar、Charles S. Swindell
DOI:10.1016/j.bioorg.2004.11.002
日期:2005.4
A highly convergent total synthesis of 12,13-desoxyepothilone B (4, Epothilone D) is described involving the coupling of vinyl iodide (5) and olefin (6). Key steps in the synthesis are the introduction of chirality at C15 via highly enantioselective lipase-mediated enzymatic resolution, diastereoselective alkylation at C8, highly diastereoselective Evans aldol reaction to establish C6-C7, and Mukaiyama
描述了高度收敛的12,13-脱氧埃坡霉素B(4,埃坡霉素D)的全合成,涉及碘乙烯(5)和烯烃(6)的偶联。合成的关键步骤是通过高对映体选择性脂肪酶介导的酶促拆分在C15处引入手性,在C8处进行非对映体选择性烷基化,建立C6-C7的高非对映体选择性Evans aldol反应和引入手性中心C3的Mukaiyama aldol反应。钯催化(5)和(6)的Suzuki偶联,提供了甲酯(27),其被转化为12,13-脱氧埃博霉素B(4)。