Synthesis and calcium antagonistic activity of diethyl styrylbenzylphosphonates
摘要:
Twenty-three new phosphonic ester derivatives of stilbene exhibiting structural analogies with fostedil are described. Examination of calcium antagonism showed that this activity could not be increased by introducing electron-withdrawing, electron-releasing or lipophilic substituents. Only compounds containing fluorine at the 2 or 4 positions exhibited similar activity to the model.
Synthesis and calcium antagonistic activity of diethyl styrylbenzylphosphonates
摘要:
Twenty-three new phosphonic ester derivatives of stilbene exhibiting structural analogies with fostedil are described. Examination of calcium antagonism showed that this activity could not be increased by introducing electron-withdrawing, electron-releasing or lipophilic substituents. Only compounds containing fluorine at the 2 or 4 positions exhibited similar activity to the model.
Immobilized Pd on (<i>S</i>)-methyl histidinate-modified multi-walled carbon nanotubes: a powerful and recyclable catalyst for Mizoroki-Heck and Suzuki-Miyaura C-C cross-coupling reactions in green solvents and under mild conditions
feasible in many cases. The energy transfer (EnT) E/Z-photoisomerization might yield the Z-isomers. In this work, CBZ6 was proven to be an EnT photocatalyst for the E → Z-isomerization of C–C or C–N double bonds. The transformations of in situ generated Z-isomers of oximes and stilbenes consequently afforded the desired reversed Beckmannrearrangement products and phenanthrenes, respectively.
考虑到化学选择性的区域选择性, Z-异构体和E-异构体的反应通常是不同的。 Z-异构体的合成在许多情况下是不可行的。能量转移 (EnT) E / Z光异构化可能会产生Z异构体。在这项工作中, CBZ6被证明是一种用于 C-C 或 C-N 双键E → Z异构化的 EnT 光催化剂。原位生成的肟和茋的Z-异构体的转化因此分别提供了所需的反向贝克曼重排产物和菲。
Synthesis and Characterization of Pd(II) and Ru(II) Complexes of Tetradentate N,N,N,N-(Diphosphinomethyl)amine Ligands: Catalytic Properties in Transfer Hydrogenation and Heck Coupling Reactions
作者:Serhan Uruş、Mustafa Keleş、Seda Köşker Akkaya
DOI:10.3987/com-20-14260
日期:——
Tetradentate N,N,N,N-(diphosphinomethyl)amine ligands and their Pd(II) and Ru(II) complexes were synthesized under a nitrogen atmosphere using Schlenk technique. The synthesized ligands and the complexes were characterized with H-1- and P-31-NMR, FT-IR, TG/DTA, and elemental analysis techniques. Pd(II) Complexes were used as catalysts in Heck coupling reactions and Ru(II) complexes were tried in transfer hydrogenation reactions of acetophenone derivatives. According to the results, L4-Pd(II) complex showed the best catalytic activity in the Heck coupling reaction of p-methylbromobenzene with o-chlorostyrene. It was confirmed that the reduction of bromo and chloroacetophenones in all catalysts the conversions were higher. The results showed that Ru(II) complexes as efficient catalysts and up to 99% conversions was occurred with bromo and chloro acetophenones in K2CO3/isopropyl alcohol media at 80 degrees C.
PHOTOCROSSLINKABLE POLYMER, INSULATING FILM, PLANARIZATION FILM, LYOPHILIC/LIQUID REPELLENT PATTERNED FILM, AND ORGANIC FIELD EFFECT TRANSISTOR DEVICE COMPRISING SAME
申请人:TOSOH CORPORATION
公开号:US20210135115A1
公开(公告)日:2021-05-06
Provided is a resin which is excellent in terms of solubility in common solvents, crosslinking temperature, time required for crosslinking, solvent resistance (cracking resistance), breakdown voltage, leakage current, solvent wettability, and planarity in cases where the resin is formed into a thin film. A resin which comprises repeating units represented by formula (1) and formula (2), and wherein the repeating unit represented by formula (2) is contained in an amount of 20% by mole or more relative to the total amount of the repeating units represented by formula (1) and formula (2).