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
One-Pot Synthesis of α-Halo β-Amino Acid Derivatives via the Difunctional Coupling of Ethyl α-Diazoacetate with Silyl Halides and N,O-Acetals or Aromatic Tertiary Amines
nucleophile and N,O-acetals as an electrophile under metal-free conditions is described. This process undergoes a novel three-component coupling (3-CC) reaction using EDA, which leads to a one-pot preparation of α-halo β-amino acid esters. Also, this protocol could be adapted to accept an electrophile composed of aromatic tertiary amines. In both 3-CC reactions, the key reaction intermediate is an iminium
Forming All‐Carbon Quaternary Stereocenters by Organocatalytic Aminomethylation: Concise Access to β
<sup>2,2</sup>
‐Amino Acids
作者:Kai Wang、Jianliang Yu、Ying Shao、Shengbiao Tang、Jiangtao Sun
DOI:10.1002/anie.202009892
日期:2020.12.21
The asymmetric synthesis of β2,2‐amino acids remains a formidable challenge in organic synthesis. Here a novel organocatalytic enantioselective aminomethylation of ketenes with stable and readily available N,O‐acetals is reported, providing β2,2‐amino esters bearing an all‐carbonquaternarystereogenic center in high enantiomeric ratios with a catalytic amount of chiral phosphoric acid. Typically,
[EN] NOVEL SUBSTITUTED ARYL DERIVATIVES, THEIR PROCESS OF PREPARATION AND THEIR THERAPEUTICAL USES AS ANTI-HIV AGENTS<br/>[FR] NOUVEAUX DÉRIVÉS ARYLES SUBSTITUÉS, LEUR PROCÉDÉ DE PRÉPARATION ET LEURS UTILISATIONS THÉRAPEUTIQUES EN TANT QU'AGENTS ANTI-VIH
申请人:CELLVIR
公开号:WO2010066847A1
公开(公告)日:2010-06-17
The present invention concerns novel substituted aryl derivatives, their process of preparation and their use for inhibiting virus replication and for treating viral diseases or disorders such as HIV and/or HCV infection.
method. N-Benzyl-Nmethylaminomethyllithium (I) was found to readily undergo a 1,2-anionic rearrangement to give N-lithio-N-methyl-β-phenethylarnine, a reaction analogous to the “Wittigrearrangement” of metalated ethers. A synthetically useful nucleophilic methylaminomethylation of an aldehyde [i.e., RCHO to RCH(OH)CH2NHCH3] has been effected through the use of (I).