GO–Cu<sub>7</sub>S<sub>4</sub> catalyzed <i>ortho</i>-aminomethylation of phenol derivatives with <i>N</i>,<i>N</i>-dimethylbenzylamines: site-selective oxidative CDC
作者:Sonu Gupta、Nisha Chandna、Pooja Dubey、Ajai K. Singh、Nidhi Jain
DOI:10.1039/c8cc03396j
日期:——
supported on grapheneoxide (GO) have been synthesized for the first time from Cu2S, and used as highly efficient heterogeneous catalysts for oxidative ortho-selective C–H aminomethylation of phenols with N,N-dimethylbenzylamines. The NPs (30–80 nm) have been characterized by HRTEM, SEM-EDX, PXRD, FTIR, Raman, ICP-AES and XPS analyses. The NP catalyzed sp2–sp3 crossdehydrogenativecoupling (CDC) features
Brønsted acid catalysed chemo- and <i>ortho</i>-selective aminomethylation of phenol
作者:Zhiqiong Tang、Dongdong Li、Yidi Yue、Dan Peng、Lu Liu
DOI:10.1039/d1ob00820j
日期:——
We have developed a Brønsted acidcatalysed highly ortho-selective functionalization of free phenols with readily available N,O-acetals under mild conditions, furnishing various corresponding aminomethylated phenol products in moderate to excellent yields. The salient features of this transformation include mild conditions, good substrate scope, excellent ortho-selectivity, high efficiency, and ease
Ruthenium-Catalyzed Aminomethylation and Methylation of Phenol Derivatives Utilizing Methanol as the C<sub>1</sub>Source
作者:Seoksun Kim、Soon Hyeok Hong
DOI:10.1002/adsc.201601117
日期:2017.3.6
involving ortho‐aminomethylation of phenol was developed via ruthenium‐catalyzed dehydrogenation of methanol, an environmentally benign C1 building block, without the use of reactive reagents. The reaction was successfully applied to a range of substrates. When naphthol was employed instead of phenol, only methylation was observed. On the basis of various mechanistic studies, we propose that formamide barely
Nickel Catalyzed Ipso-hydroxylation and Subsequent Cross Dehydrogenative Coupling of Arylboronic Acids with Tertiary Amines: A Facile Access to α-phenolated Tertiary Amines
been developed for the α‐functionalization of tertiary amines via sequential oxidative hydoxylation and cross‐dehydrogenative coupling (CDC) of arylboronic acids with tertiary amines to afford α‐phenolated tertiary amines. The results demonstrate an easy arylation of C(sp3)−H bond in the presence of an inexpensive and readily available nickel metal salt.
transition-metal-free strategy regarding an iodine–sodium percarbonate catalysis to achieve the ortho-aminomethylation of phenols in aqueous media has been developed. This method can effectively broaden a wide range of phenols, tolerate sensitive functional groups, and achieve the late-stage functionalization of ten functional molecules that contain phenolic structures.