[EN] STEREOSELECTIVE SYNTHESIS OF HIGHLY SUBSTITUTED ENAMIDES<br/>[FR] SYSNTHÈSE STÉRÉOSÉLECTIVE D'ÉNAMIDES À FORTE SUBSTITUTION
申请人:UNIV NANYANG TECH
公开号:WO2012173572A1
公开(公告)日:2012-12-20
The disclosure provides new methods for the oxidative Heck cross-coupling reaction with electron-rich alkenes such as substituted β-amidoacrylate and other related substituted enamides. Previously, functionalization of enamides under Heck conditions has been limited to those with unsubstituted vinyl groups. By tuning the reaction parameters that allow for the balance between stability and reactivity of the reactants, the oxidative Heck cross-coupling reaction now provides highly substituted enamides in good to excellent yields. (II) (III) (I)·
Copper-Catalyzed Asymmetric Protoboration of β-Amidoacrylonitriles and β-Amidoacrylate Esters: An Efficient Approach to Functionalized Chiral α-Amino Boronate Esters
作者:Lili Chen、Xiaoliang Zou、Haonan Zhao、Senmiao Xu
DOI:10.1021/acs.orglett.7b01740
日期:2017.7.7
delivering a series of stable functionalized chiral α-amino boronate esters in good yields and enantioselectivities under mild reaction conditions. The current method is also applicable for gram-scale synthesis without erosion of enantioselectivity. This work provides an attractive and complementary approach to synthesizing enantioriched chiral α-amino boronate esters.
Magnetically recyclable palladium nanoparticles (Fe
<sub>3</sub>
O
<sub>4</sub>
‐Pd) for oxidative coupling between amides and olefins at room temperature
for the synthesis of magnetically recyclable palladium nanoparticles (Fe3O4‐Pd) is described. The catalytic application of the Fe3O4‐Pd nanoparticles was explored for the first time in oxidative coupling between amides and olefins. p‐Toluenesulfonic acid plays a significant role in the oxidative amidation reaction. The reaction proceeds at roomtemperature, resulting in (Z)‐enamides under ambient air
描述了一种方便的合成可磁回收钯纳米颗粒(Fe 3 O 4 -Pd)的方法。Fe 3 O 4 -Pd纳米颗粒的催化应用首次在酰胺和烯烃之间的氧化偶联中得到了探索。对甲苯磺酸在氧化酰胺化反应中起着重要作用。反应在室温下进行,在没有助催化剂和配体的情况下,在环境空气中生成(Z)酰胺。Fe 3 O 4的超顺磁性‐Pd有助于轻松,定量地从反应混合物中回收催化剂,并且可以重复使用多达三个连续周期,但催化活性会略有下降。