A Convoluted Polyvinylpyridine‐Palladium Catalyst for Suzuki‐Miyaura Coupling and C−H Arylation
作者:Aya Ohno、Takuma Sato、Toshiaki Mase、Yasuhiro Uozumi、Yoichi M. A. Yamada
DOI:10.1002/adsc.202000742
日期:2020.11.4
and reusablesupportedcatalysts for Suzuki‐Miyaura coupling and catalytic C−H arylation is important for fundamental and applied chemistry, with these reactions being used to produce medical compounds and functional materials. Herein, we found that a mesoporous composite made of a linear poly(4‐vinylpyridine) and tetrachloropalladate acted as a dual‐mode catalyst for a variety of cross‐coupling reactions
Bis(imino)acenaphthene (BIAN)-Supported <i>N</i>-Heterocyclic Carbene Palladium Complexes with Ancillary Ligands: Readily Activated Precatalysts for Direct C–H Arylation of Thiophenes
作者:Di-Zhong Zheng、Dong-Hui Li、Huan Liu、Youxiang Shao、Zhuofeng Ke、Feng-Shou Liu
DOI:10.1021/acs.organomet.2c00007
日期:2022.4.25
thiophenes with (hetero)aryl bromides by bulky bis(imino)acenaphthene (BIAN)-supported N-heterocyclic carbene palladiumcomplexes. The relationship between the structure of palladiumcomplexes with ancillary ligands and catalytic properties was discussed. Upon a low palladium loading of 0.01–0.05 mol %, the bulky palladiumcomplex was successfully used to catalyze the cross-coupling of a variety of thiophens
The invention relates to acylamino-phthalic acid amides and related compounds of formula (I) wherein A is —CON—R
3
R
4
, —NR
5
COR
6
, —NHR
7
, —OR
8
, —SR
9
, —CH
2
NR
10
R
11
, —(CH2)2-R
12
, —CH═CH—R
12
, —C≡C—R
12
, optionally substituted phenyl, optionally substituted thiophenyl, or optionally substituted 1,2,3-triazol-4-yl, W is hydrogen, hydroxy or carboxymethoxy, Y is carboxy, methoxycarbonyl or 2H-tetrazol-5-yl, and the various substituents R have the meanings indicated in the description. These compounds are useful for the treatment and/or prophylaxis of skeletal muscle atrophy, schizophrenia and Alzheimer's disease, and as cognitive enhancers.
Palladium hetero‐di(N‐heterocyclic carbene) complexes and their catalytic activities in direct C–H arylation of heteroarenes
作者:Kausani Ghatak、Han Vinh Huynh
DOI:10.1002/aoc.6717
日期:——
neutral and cationic palladium complexes of cis-chelating hetero-dicarbene ligands have been prepared. These ligands contain two different NHC donors allowing for a wider degree of variation, and the impact of the distinct NHC units has been compared using various spectroscopic means. In addition, the catalyticactivities of these complexes in the direct C-H arylation of thiophenes with aryl halides
thiophenes/furans and diethyl bromomalonate as the starting materials. Various 2-substituted (benzo)thiophenes/furans were suitable for the C3-ethoxycarbonylmethylation. The free radical mechanism was proposed based on the results of control experiments, cyclic voltammetry experiments and luminescence quenching experiments. We suggested that the heteroleptic halogen-bridged iridium(III) dimers might play