The first generalpalladium-catalyzedcarbonylative vinylation of aryl halides with olefins in the presence of CO has been developed. Applying a catalyst system consisting of [(cinnamyl)PdCl](2) and bulky imidazolyl-phosphine ligand L1 allows for the efficient and selective synthesis of α,β-unsaturated ketones under mild reaction conditions. Starting from easily available aryl halides and olefins,
在 CO 存在下,第一个通用钯催化的芳基卤化物与烯烃的羰基化乙烯基化已经被开发出来。应用由 [(肉桂基)PdCl](2) 和庞大的咪唑基膦配体 L1 组成的催化剂体系,可以在温和的反应条件下高效和选择性地合成 α,β-不饱和酮。从容易获得的芳基卤化物和烯烃开始,可以以简单的方式制备通用的结构单元。证明了这种新协议的通用性和功能组耐受性。
Orchestrating a β-Hydride Elimination Pathway in Palladium(II)-Catalyzed Arylation/Alkenylation of Cyclopropanols Using Organoboron Reagents
作者:Thangeswaran Ramar、Murugaiah A. M. Subbaiah、Andivelu Ilangovan
DOI:10.1021/acs.joc.1c02735
日期:2022.4.1
scope of chemoselective β-hydride elimination in the context of arylation/alkenylation of homoenolates from cyclopropanol precursors using organoboronic reagents as transmetalation coupling partners was examined. The reaction optimization paradigm revealed a simple ligand-free Pd(II) catalytic system to be most efficient under open air conditions. The preparative scope, which was investigated with
A series of novel dioxin-containing triaryl pyrazoline derivatives C1-C20 have been synthesized. Their B-Raf inhibitory and anti-proliferation activities were evaluated. Compound C6 displayed the most potent biological activity against B-Raf(V600E) and WM266.4 human melanoma cell line with corresponding IC50 value of 0.04 mu M and GI(50) value of 0.87 mu M, being comparable with the positive controls and more potent than our previous best compounds. Moreover, C6 was selective for B-Raf(V600E) from B-Raf(WT), C-Raf and EGFR and low toxic. The docking simulation suggested the potent bioactivity might be caused by breaking the limit of previous binding pattern. A new 3D QSAR model was built with the activity data and binding conformations to conduct visualized SAR discussion as well as to introduce new directions. Stretching the backbone to outer space or totally reversing the backbone are both potential orientations for future researches. (C) 2016 Elsevier Ltd. All rights reserved.
FEDOROV B. S.; PRIBYTKOVA L. G.; DOMBROVSKIJ A. V., UKR. XIM. ZH., 1977, 43, HO 7,
作者:FEDOROV B. S.、 PRIBYTKOVA L. G.、 DOMBROVSKIJ A. V.
DOI:——
日期:——
DAUKSHAS V. K.; GAJDYALIS P. G.; PYATRAUSKAS O. YU.; UDRENAJTE EH. B.; GA+, XIM.-FARMATS. ZH., 21,(1987) N 5, 569-573
作者:DAUKSHAS V. K.、 GAJDYALIS P. G.、 PYATRAUSKAS O. YU.、 UDRENAJTE EH. B.、 GA+