Leustroducsin B 具有多种生物活性和独特的结构特征。Leustroducsin B 的高效且高度收敛的全合成通过 17 个最长的线性步骤和 39 个总步骤实现,方法是将分子断开为具有相似复杂度水平的三个片段。这些片段通过高效螯合控制将乙烯基锌酸盐添加到 α-羟基酮和硅介导的交叉偶联来连接。中央和西部片段的立体化学通过锌-苯酚催化的羟醛反应和钯催化的不对称烯丙基烷基化以高产率和优异的催化进行设置。
Leustroducsin B 具有多种生物活性和独特的结构特征。Leustroducsin B 的高效且高度收敛的全合成通过 17 个最长的线性步骤和 39 个总步骤实现,方法是将分子断开为具有相似复杂度水平的三个片段。这些片段通过高效螯合控制将乙烯基锌酸盐添加到 α-羟基酮和硅介导的交叉偶联来连接。中央和西部片段的立体化学通过锌-苯酚催化的羟醛反应和钯催化的不对称烯丙基烷基化以高产率和优异的催化进行设置。
A convergent approach toward phoslactomycins and leustroducsins
作者:Valérie Druais、Michael J. Hall、Camilla Corsi、Sebastian V. Wendeborn、Christophe Meyer、Janine Cossy
DOI:10.1016/j.tet.2010.05.050
日期:2010.8
reported. A formalsynthesis of phoslactomycin B was achieved in which the key steps are a [2,3]-Wittig rearrangement to control the C4 and C5 stereocenters, a diastereoselective addition of an acetylenic Grignard reagent to an α-alkoxy ketone to create the C8 tertiary alcohol, and a relay ring-closing metathesis to construct the α,β-unsaturated δ-lactone. In this approach, all the stereocenters originate
fragment relevant to the phoslactomycin/leustroducsin family of natural products has been accomplished in a straightforward fashion. The new synthetic strategy involves a Nelson's catalytic asymmetric [2+2] cycloaddition between acyl chlorides and aldehydes, followed by ring extension.
A Highly Convergent Total Synthesis of Leustroducsin B
作者:Barry M. Trost、Berenger Biannic、Cheyenne S. Brindle、B. Michael O’Keefe、Thomas J. Hunter、Ming-Yu Ngai
DOI:10.1021/jacs.5b07438
日期:2015.9.16
large variety of biological activities and unique structural features. An efficient and highlyconvergent total synthesis of Leustroducsin B was achieved in 17 longest linear and 39 total steps by disconnecting the molecule into three fragments having similar levels of complexity. These pieces were connected via a highly efficient chelate-controlled addition of a vinyl zincate to an α-hydroxy ketone and
Leustroducsin B 具有多种生物活性和独特的结构特征。Leustroducsin B 的高效且高度收敛的全合成通过 17 个最长的线性步骤和 39 个总步骤实现,方法是将分子断开为具有相似复杂度水平的三个片段。这些片段通过高效螯合控制将乙烯基锌酸盐添加到 α-羟基酮和硅介导的交叉偶联来连接。中央和西部片段的立体化学通过锌-苯酚催化的羟醛反应和钯催化的不对称烯丙基烷基化以高产率和优异的催化进行设置。