the rate of acid-catalysed reduction of aromatic aldehydes by AcH2 are shown to be very small, as being compatible with those observed for liver alcohol dehydrogenase (LADH)-catalysed reduction of the corresponding aldehydes by NADH. Moreover, the absolute value of the rate constant for the hydride-transfer step from free AcH2 to the protonated benzaldehyde in our model system is also shown to be compatible
PHENANTHRENEQUINONE COMPOUND, ELECTRODE ACTIVE MATERIAL, AND POWER STORAGE DEVICE
申请人:Ohtsuka Yu
公开号:US20100047688A1
公开(公告)日:2010-02-25
Disclosed is a novel organic compound synthesized by oligomerizing or polymerizing a specific quinone compound having two quinone groups at the ortho position and having a property such that the electron transfer occurs associated with a reversible redox reaction, the organic compound being insoluble in an organic solvent and having a high energy density, and thus being useful as an electrode active material for a power storage device. Using this organic compound as an electrode active material can improve the energy density, reduce the weight and size, and improve the functionality of the power storage device.
Disclosed are compounds and derivatives thereof, their synthesis, and their use as Rho-kinase inhibitors. These compounds are useful for inhibiting tumor growth, treating erectile dysfunction, and treating other indications mediated by Rho-kinase, e.g., coronary heart disease.
is successfully realized in aproticmedia by using 1-butyl-4,4′-bipyridinium cation radical (BuPPH\underset.+), which is prepared from 1-butyl-4-(4-pyridyl)pyridinium ion. Hydrogen reduction with BuPPH\underset.+ was discriminated from electron reduction with octylviologen cation radical by the chemoselective reduction preferring enedione to vic-dibromide in aproticmedia.
Three water-soluble copper(<scp>ii</scp>) <i>N</i>-heterocyclic carbene complexes: toward copper-catalyzed ketone reduction under sustainable conditions
作者:Mitu Sharma、Amanda M. Perkins、Raymond Femi Awoyemi、Allison N. Schmittou、Selvam Raju、Brad S. Pierce、Bruno Donnadieu、David O. Wipf、Sean L. Stokes、Joseph P. Emerson
DOI:10.1039/d3dt03406b
日期:——
using 2-acetylpyridine and phenylsilane. The relationships between product formation, temperature, reaction time, and catalyst loading for the hydrogenationreactions are covered in detail. Reduction of eighteen different aliphatic, cyclic, and aromatic ketones were demonstrated, which were compatible to produce the corresponding products in moderate to good yields. These systems were used to develop
合成了一系列含咪唑、苯并咪唑和5,6-二甲基苯并咪唑唑环的三齿铜( II ) N-杂环卡宾(NHC)配合物,并通过X射线晶体学、ESI-MS、循环伏安法和UV-质谱进行了全面表征。可见光和 EPR 光谱研究。然后利用这些配合物在可持续条件下使用 2-乙酰基吡啶和苯基硅烷优化酮的还原。详细介绍了氢化反应的产物形成、温度、反应时间和催化剂负载之间的关系。证明了十八种不同的脂肪族酮、环状酮和芳香酮的还原,这些酮可以以中等至良好的产率生产相应的产品。这些系统用于开发相关的 DNA 杂化催化系统,但仅支持较弱的对映选择性。进一步的热力学实验表明 Cu-NHC 复合物没有表现出与 DNA 的特异性结合,这与其有限的选择性相一致。