Azetidine-derived dinuclear zinc catalyzed asymmetric phospha-Michael addition of dialkyl phosphite to α,β-unsaturated carbonyl compounds
作者:Shanshan Liu、Na Shao、Feng-Zhen Li、Xiao-Chao Yang、Min-Can Wang
DOI:10.1039/c7ob02222k
日期:——
The asymmetric phospha-Michael addition of dialkyl phosphite to α,β-unsaturated carbonyl compounds by using an azetidine-derived dinuclear zinc catalyst was described. The catalyst was proved to be general and efficient for a broad spectrum of enones and α,β-unsaturated N-acylpyrroles. A series of phosphonate-containing compounds were generated with excellent enantioselectivities (up to 99% ee) and
Electrochemical and Spectroscopical Characterization of Ferrocenyl Chalcones
作者:Rocío A. Cardona、Kenneth Hernández、Laura E. Pedró、Myrna R. Otaño、Ingrid Montes、Ana R. Guadalupe
DOI:10.1149/1.3439669
日期:——
as evidenced by ΔE p of 72-90 mV and I pa /I pc values equal to 1.0-1.17. The redox formalpotential (E°') for these compounds range between 665 and 774 mV. The heterogeneous electron-transfer rate constants calculated from the Nicholson method are in the range of (2.0-4.4) X 10- 2 cm/s. Their diffusioncoefficients are on the order of (1.65-3.7) X 10 ―5 cm 2 /s, and the number of electrons transferred
我们报告了 10 种二茂铁查耳酮的电化学和光谱表征。这些化合物是由乙酰二茂铁和相应的苯甲醛或吡啶甲醛通过 Claisen-Schmith 缩合合成的。化合物以良好的收率(>60%)获得并通过重结晶纯化。所有化合物都表现出准可逆的电化学行为和化学可逆性,正如 72-90 mV 的 ΔE p 和等于 1.0-1.17 的 I pa /I pc 值所证明的那样。这些化合物的氧化还原形式电位 (E°') 介于 665 和 774 mV 之间。由 Nicholson 方法计算的异质电子转移速率常数在 (2.0-4.4) X 10-2 cm/s 的范围内。它们的扩散系数在 (1.65-3.7) X 10 ―5 cm 2 /s 的数量级上,转移的电子数等于 1。1-ferrocenyl-3-(pN,N-二甲基氨基苯基)prop-2-en-1-one 表现出与二甲基苯胺相似的行为并进行电聚合,产生阳离子低
Solvent-free synthesis, characterization, biological activity of schiff bases and their metal (II) complexes derived from ferrocenyl chalcone
作者:Yuting Liu、Lisha Yang、Dawei Yin、Yang Dang、Lan Yang、Qian Zou、Jie Li、Jiaxi Sun
DOI:10.1016/j.jorganchem.2019.120903
日期:2019.10
method for the synthesis of ferrocenyl chalcone Schiffbases and their metal (II) complexes has been developed. Schiffbases were synthesized with TsOH (p-toluenesulfonic acid) as catalyst and complexed with metal (II) salts (Zn (II), Pb (II), Cd (II), Ni (II)). The compounds were characterized by various spectroscopic techniques and elemental analysis. The thermal stability of the complexes was performed