电荷转移络合物和光照射的结合为可持续化学的要求提供了一个有前途的解决方案。在此,我们开发了膦催化的可见光诱导的烷基碘与酚类和醚类的烷氧基羰基化反应。基于电子供体-受体光活化策略,该反应可以在无过渡金属的条件下在常压 CO 下实现。这种有前途的方法展示了高官能团耐受性和出色的化学选择性。此外,还可以实现由未活化的烯烃和全氟烷基碘化物合成β-全氟烷基酰氧基酯的五组分全氟烷基化羰基化反应。此外,由于克级反应的优异性能和13CO结果,它为大规模生产和其他应用提供了潜在的机会。
Cobalt-catalyzed alkoxycarbonylation of ethers: Direct synthesis of α-oxy esters from phenols and alcohols
作者:Le-Cheng Wang、Jian-Xing Xu、Xiao-Feng Wu
DOI:10.1016/j.jcat.2022.08.034
日期:2022.10
alkoxycarbonylation of ethers has been accomplished. This new catalytic system allows the use of ethers, important building blocks in organic synthesis, as the carbonylation substrates. A variety of phenols and alcohols were transformed to the corresponding α-oxy ester derivatives in high yields with excellent functional group tolerance. In addition, several pharmaceutical and bioactive molecule related compounds
Anthrazoline Photocatalyst for Promoting Esterification and Etherification Reactions via Photoredox/Nickel Dual Catalysis
作者:Xiaolin Zhu、Qiujin Fan、Wei Luo、Danfeng Wang、Yihui Jia、Heyang Li、Zhen Wang、Qi Xiao、Xiaoming He
DOI:10.1002/cjoc.202200663
日期:2023.2.15
readily prepared anthrazoline photocatalyst, which can effectively promote C—O bond formation reactions with the aid of Ni(II) complex. This methodology enables the esterification (36 examples) and etherification (8 examples) with a broad range of scope, allowing aryl and alkyl halides coupled with diverse carboxylic acids/alcohols. Our metal-free photocatalysts have a potential broad application, may
Exogenous Ligand‐Free Nickel‐Catalyzed Carboxylate
<i>O</i>
‐Arylation: Insight into Ni
<sup>I</sup>
/Ni
<sup>III</sup>
Cycles**
作者:Lukas A. Wolzak、Felix J. de Zwart、Jean‐Pierre H. Oudsen、Stuart A. Bartlett、Bas de Bruin、Joost N. H. Reek、Moniek Tromp、Ties J. Korstanje
DOI:10.1002/cctc.202200547
日期:2022.9.20
Nickelcatalysis: Nickel-catalyzed cross-couplingreactions have become a powerful methodology to construct C-heteroatom bonds but often require non-equimolar amounts of coupling partners. In this study we reveal the competition between productive catalysis and deleterious pathways (comproportionation and protodehalogenation) in the commonly proposed self-sustained NiI/NiIII catalytic cycle. Thereby
Cell migration inhibiting compositions and methods and compositions for treating cancer
申请人:Edwards L. David
公开号:US20060128742A1
公开(公告)日:2006-06-15
Methods for treating an individual having cancer are provided. The method may include administering a cell migration inhibitor and a chemotherapeutic agent to the individual to inhibit migration of cancer cell. Inhibiting cell migration may increase cell division. In this manner, the cell migration inhibitor and the chemotherapeutic agent in combination may have increased efficacy compared to the chemotherapeutic agent alone due to the increased cell division. The cell migration inhibitor may include any of the inhibitors described herein. For example, the cell migration inhibitor may be an organic molecule having a molecular weight of less than about 700, a monoclonal antibody, or a natural product.