Palladium-catalyzed denitrative Suzuki coupling of nitroarenes using 2-aryl-5-(2,4,6-triisopropylphenyl)-2,3-imidazolylidene[1,5-a]pyridines as the ligands is described. The key to success is the use of the NHC ligands which show strong donating ability and suitable steric hindrance allowing the successful oxidative addition of Ar–NO2 bonds. Both aromatic and aliphatic boronic acids are tolerated,
描述了使用2-芳基-5-(2,4,6-三异丙基苯基)-2,3-咪唑基亚甲基[1,5- a ]吡啶作为配体的钯催化硝基芳烃的反硝化Suzuki偶联。成功的关键是使用NHC配体,该配体显示出强大的供体能力和适当的空间位阻,可以成功地氧化添加Ar–NO 2键。芳族和脂族硼酸都可以被接受,并且以良好或优异的收率获得了各种联苯和烷基芳烃。
The highly efficient air oxidation of aryl and alkyl boronic acids by a microwave-assisted protocol under transition metal-free conditions
作者:Weiyan Yin、Xizhi Pan、Wenxi Leng、Jian Chen、Haifeng He
DOI:10.1039/c9gc01965k
日期:——
Molecular oxygen is the most important green-oxidant due to its excellent properties. However, the effective utilization of molecular oxygen remains a major challenge in modern chemistry. Herein, we report the development a rapid, green and efficient microwave-assisted protocol for the air oxidation of boronic acids to phenols and alcohols under transition metal-free conditions. In the presence of
Molecular Oxygen-Mediated Minisci-Type Radical Alkylation of Heteroarenes with Boronic Acids
作者:Lizhi Zhang、Zhong-Quan Liu
DOI:10.1021/acs.orglett.7b03297
日期:2017.12.15
The carbon–carbonbondformation via autoxidation of organoboronic acid using 1 atm of O2 is achieved in a simple, clean, and green fashion. The approach allows a technically facile and environmentally benign access to structurally diverse heteroaromatics with medicinally privileged scaffolds. The strategy also displays its practicality and sustainability in the resynthesis of marketed drugs Crestor
Visible-light-induced deboronative alkylarylation of acrylamides with organoboronic acids
作者:Xuezhi Li、Man-Yi Han、Bin Wang、Lei Wang、Min Wang
DOI:10.1039/c9ob01023h
日期:——
A visible-light-induced deboronative alkylarylation of acrylamides with boronic acids was developed via a tandem reaction process.
通过串联反应过程,开发了一种可见光诱导的丙烯酰胺与硼酸脱硼芳香化反应。
t-Butyl pyridine and phenyl C-region analogues of 2-(3-fluoro-4-methylsulfonylaminophenyl)propanamides as potent TRPV1 antagonists
作者:Sunho Lee、Dong Wook Kang、HyungChul Ryu、Changhoon Kim、Jihyae Ann、Hobin Lee、Eunhye Kim、Sunhye Hong、Sun Choi、Peter M. Blumberg、Robert Frank-Foltyn、Gregor Bahrenberg、Hannelore Stockhausen、Thomas Christoph、Jeewoo Lee
DOI:10.1016/j.bmc.2017.03.004
日期:2017.4
A series of 2-substituted 6-t-butylpyridine and 4-t-butylphenyl C-region analogues of 2-(3-fluoro-4-methylsulfonamidophenyl)propanamides were investigated for hTRPV1 antagonism. The analysis of structure activity relationships indicated that the pyridine derivatives generally exhibited a little better antagonism than did the corresponding phenyl surrogates for most of the series. Among the compounds
研究了一系列 2-(3-氟-4-甲基磺酰氨基苯基)丙酰胺的 2-取代 6-叔丁基吡啶和 4-叔丁基苯基 C 区类似物的 hTRPV1 拮抗作用。结构活性关系分析表明,对于大多数系列,吡啶衍生物通常比相应的苯基替代物表现出更好的拮抗作用。其中,化合物7对辣椒素活化表现出优异的拮抗作用,Ki=0.1nM,而化合物60S在神经病理性疼痛模型中表现出强效的抗异常疼痛作用,10mg/kg的MPE为83%。hTRPV1同源模型中7S的对接研究表明,7S的A/B区与Tyr511之间的相互作用以及7S的C区中的叔丁基和乙基与Tyr511的两个疏水结合袋之间的相互作用hTRPV1 促成了高效力。