Synthetic Efforts toward the Macrolactone Core of Leucascandrolide A
摘要:
[Graphics]A chemoselective synthesis of 1, the macrocyclic core of leucascandrolide A, has been achieved by utilizing highly enantioselective allylmetalations, an enantioselective Noyori reduction of a propargylic ketone, and olefin metatheses as the key steps.
Efficient, divergent synthesis of cryptophycin unit A analogues
作者:Kyle L. Bolduc、Scott D. Larsen、David H. Sherman
DOI:10.1039/c2cc32417b
日期:——
A flexible and divergent synthesis of cryptophycin unit A analogues is described. This method relies on iridium-catalysed stereo- and enantioselective crotylation and chemoselective one-pot oxidative olefination to access common intermediate . Heck, cross metathesis, and Suzuki-Miyaura reactions are illustrated for the generation of methyl ester unit A analogues .
描述了一种灵活多变的隐藻素单元 A 类似物的合成方法。该方法依赖于铱催化的立体和对映选择性巴豆化和化学选择性一锅氧化烯化来获得常见的中间体。Heck、交叉复分解和 Suzuki-Miyaura 反应被说明用于生成甲酯单元 A 类似物。
Synthetic Efforts toward the Macrolactone Core of Leucascandrolide A
[Graphics]A chemoselective synthesis of 1, the macrocyclic core of leucascandrolide A, has been achieved by utilizing highly enantioselective allylmetalations, an enantioselective Noyori reduction of a propargylic ketone, and olefin metatheses as the key steps.
Spiroacetal Formation through Telescoped Cycloaddition and Carbon-Hydrogen Bond Functionalization: Total Synthesis of Bistramide A
作者:Xun Han、Paul E. Floreancig
DOI:10.1002/anie.201406819
日期:2014.10.6
Spiroacetals can be formed through a one‐pot sequence of a hetero‐Diels–Alder reaction, an oxidative carbon–hydrogenbond cleavage, and an acid treatment. This convergent approach expedites access to a complex molecular subunit which is present in numerous biologically active structures. The utility of the protocol is demonstrated through its application to a brief synthesis of the actin‐binding cytotoxin
螺缩醛可以通过杂狄尔斯-阿尔德反应、氧化碳氢键断裂和酸处理的一锅顺序形成。这种趋同方法加快了对存在于众多生物活性结构中的复杂分子亚基的访问。该协议的实用性通过其在肌动蛋白结合细胞毒素双酰胺 A 的简要合成中的应用得到证明。