Copper-Catalyzed Dehydrogenative Coupling of Arenes with Alcohols
作者:Sukalyan Bhadra、Christian Matheis、Dmitry Katayev、Lukas J. Gooßen
DOI:10.1002/anie.201303702
日期:2013.8.26
What a couple! Arenes functionalized with donating groups undergo oxidative dehydrogenativecoupling with alcohols in the presence of a copper/silver catalyst system. This intermolecular CH alkoxylation provides a convenient synthetic route to the important class of aryl ethers. The catalyst system also allows the alkoxylation of benzylic CH groups with formation of benzyl alkyl ethers.
Directing Group‐Promoted Inert C−O Bond Activation Using Versatile Boronic Acid as a Coupling Agent
作者:Ram Ambre、Ting‐Hsuan Wang、Anmei Xian、Yu‐Shiuan Chen、Yu‐Fu Liang、Titel Jurca、Lili Zhao、Tiow‐Gan Ong
DOI:10.1002/chem.202004132
日期:2020.12.18
strategy facilitates the efficient catalytic cross‐coupling of methoxyarenes with a variety of organoboronreagents. Directing groups facilitate the activation of inert C−O bonds in under‐utilized aryl methyl ethers enabling their adaptation for C−C cross‐coupling reactions as less toxic surrogates to the ubiquitous haloarenes. The method reported enables C−C cross‐coupling with readily available and economical
Rad transition: The combination of transition‐metal‐catalyzed CHactivation and a NHPI‐initiated radical process is essential for the title transformation. The neutral conditions and the ideal oxidant, molecular oxygen, make this hydroxylation environmentally friendly and practical. NHPI=N‐hydroxyphthalimide.
Alkyl carbon-oxygen bonds of alkylarylethers bearing suitable coordination sites were efficiently cleaved by treatment with nickel(II) chloride and zinc in p-xylene under neutral conditions.
在中性条件下,在对二甲苯中用氯化镍 (II) 和锌处理,可以有效地裂解带有合适配位点的烷基芳基醚的烷基碳-氧键。
Introducing Conformational Restraints on 25CN-NBOH: A Selective 5-HT<sub>2A</sub> Receptor Agonist
作者:Emil Marcher-Rørsted、Jitka Nykodemová、Kasper Harpsøe、Anders A. Jensen、Jesper L. Kristensen
DOI:10.1021/acsmedchemlett.3c00014
日期:2023.3.9
serotonin 2A receptor (5-HT2AR) over the closelyrelated serotonin 2C receptor (5-HT2CR) have emerged. These include 4-(2-((2-hydroxybenzyl)amino)ethyl)-2,5-dimethoxybenzonitrile (25CN-NBOH, 1) and 2-(2,5-dimethoxy-4-bromobenzyl)-6-(2-methoxyphenyl)piperidine (DMPMBB, 2). The present work entails the synthesis and characterization of ligands wherein the structures of these two molecules have been fused
N-苄基苯乙胺 (NBOMes) 是一类配体,从该配体中出现的化合物对血清素 2A 受体 (5-HT 2A R) 比密切相关的血清素 2C 受体 (5-HT 2C R) 具有令人印象深刻的选择性。这些包括4-(2-((2-羟基苄基)氨基)乙基)-2,5-二甲氧基苯甲腈(25CN-NBOH, 1 )和2-(2,5-二甲氧基-4-溴苄基)-6-(2-甲氧基苯基)哌啶(DMPMBB, 2 )。目前的工作涉及配体的合成和表征,其中这两个分子的结构已经融合。通过六步合成程序获得所需化合物,然后对所得外消旋混合物进行手性拆分,得到一种活性(( S , S ) -3 )和三种基本上无活性的立体异构体。计算机实验支持四种可能的立体异构体中的一种具有活性。进一步的计算机研究表明, 1、2和 ( S , S ) -3具有共同的结合模式,进一步支持了活性对映体 (( S , S ) -3 ) 和2之间共享的立体化学。