Facile Synthesis of Chiral
<scp>α‐Hydroxy</scp>
Ketones by a
<scp>Ni‐Catalyzed</scp>
Multicomponent Hydrometallation–
<scp>CO</scp>
Insertion–Enantioconvergent Alkylation Cascade
作者:Jian Chen、Gao Deng、You Wang、Shaolin Zhu
DOI:10.1002/cjoc.202200491
日期:2023.2
selective generation of the desired product can be challenging. Herein, we report that a highly chemo-, regio- and enantioselective reductive hydrocarbonylation of alkenes has been achieved using a chloroformate ester as a source of CO. A wide range of structurally diverse α-hydroxyketones, privileged structural elements in bioactive molecules and useful building blocks, were obtained from such reactions
NiH 催化的多组分烯烃还原加氢官能化是一种有吸引力但探索不足的快速增加分子复杂性的方法。在此过程中,选择性生成所需产品可能具有挑战性。在此,我们报道了使用氯甲酸酯作为 CO 来源实现了烯烃的高度化学选择性、区域选择性和对映选择性还原烃基化。多种结构多样的 α-羟基酮、生物活性分子中的特殊结构元素和有用的构建块,是从这种具有高对映体纯度的反应中获得的。
Total Synthesis of Paecilospirone
作者:Tsz-Ying Yuen、Sung-Hyun Yang、Margaret A. Brimble
DOI:10.1002/anie.201103117
日期:2011.8.29
Neutrality is the best policy: Key features of the first totalsynthesis of paecilospirone include an anti‐selective, lactate‐derived aldol reaction, and a double deallylation/spirocyclization conducted at neutral pH to construct the sensitive hydroxy‐substituted benzannulated spiroacetal (see scheme; Bn=benzyl, TBS=tert‐butyldimethylsilyl, TES=triethylsilyl).