Oxalic Diamides and <i>tert</i>-Butoxide: Two Types of Ligands Enabling Practical Access to Alkyl Aryl Ethers via Cu-Catalyzed Coupling Reaction
作者:Zhixiang Chen、Yongwen Jiang、Li Zhang、Yinlong Guo、Dawei Ma
DOI:10.1021/jacs.8b12142
日期:2019.2.27
A robust and practical protocol for preparing alkyl aryl ethers has been developed, which relies on using two types of ligands to promote Cu-catalyzed alkoxylation of (hetero)aryl halides. The reaction scope is very general for a variety of coupling partners, particularly for challenging secondary alcohols and (hetero)aryl chlorides. In case of coupling with aryl chlorides and bromides, two oxalic
已经开发了一种用于制备烷基芳基醚的稳健实用的方案,该方案依赖于使用两种类型的配体来促进 Cu 催化的(杂)芳基卤化物的烷氧基化。反应范围非常适用于各种偶联伙伴,尤其是具有挑战性的仲醇和(杂)芳基氯。在与芳基氯化物和溴化物偶联的情况下,两个草酸二酰胺作为强大的配体。叔丁醇首先被证明是铜催化偶联反应的配体,导致芳基碘化物在室温下完成烷氧基化。此外,许多碳水化合物衍生物适用于该偶联反应,以 29-98% 的产率提供相应的碳水化合物-芳基醚。
Novel process for the preparation of flecainide, its pharmaceutically acceptable salts and important intermediates thereof
申请人:Wang Zhi-Xian
公开号:US20050059825A1
公开(公告)日:2005-03-17
Process for the preparation of Flecainide, its pharmaceutically acceptable salts and important intermediates thereof that involves the use of the 2-halobenzoic acid and its derivatives as a starting material. The use of this process also allows for the synthesis of a novel intermediate useful in the production of Flecainide. This new process is an inexpensive and efficient process for the manufacture of these compounds.
&agr;,&agr;-dibromo-&agr;-chloro-acetophenones as synthons
申请人:Geneva Pharmaceuticals, Inc.
公开号:US06458957B1
公开(公告)日:2002-10-01
This disclosure relates to the use of &agr;,&agr;-dibromo-&agr;-chloroacetophenone compounds as intermediates for the preparation of aromatic carbonyl compounds, especially aromatic amides. The compound 2,5-bis(2,2,2-trifluoroethoxy)-&agr;,&agr;-dibromo-&agr;-chloroacetophenone is especially useful as an intermediate for the preparation of flecainide, a known pharmaceutical.
Synthesis of Fluorinated Alkyl Aryl Ethers by Palladium-Catalyzed C–O Cross-Coupling
作者:Robert Szpera、Patrick G. Isenegger、Maxime Ghosez、Natan J. W. Straathof、Rosa Cookson、David C. Blakemore、Paul Richardson、Véronique Gouverneur
DOI:10.1021/acs.orglett.0c02347
日期:2020.8.21
cross-coupling of (hetero)aryl bromides with fluorinated alcohols using the commercially available precatalyst tBuBrettPhos Pd G3 and Cs2CO3 in toluene. This Pd-catalyzed coupling features a short reaction time, excellent functional group tolerance, and compatibility with electron-rich and -poor (hetero)arenes. The method provides access to 18F-labeled trifluoroethyl ethers by cross-coupling with [
在本文中,我们报告了一种高效的方案,可使用市售的预催化剂t BuBrettPhos Pd G3和Cs 2 CO 3在甲苯中将(杂)芳基溴化物与氟化醇交叉偶联。这种钯催化的偶联反应具有反应时间短,对官能团的耐受性强以及与富电子和贫电子(杂)芳烃相容的特点。该方法通过与[ 18 F]三氟乙醇交叉偶联而获得18 F-标记的三氟乙基醚。
A practical ligand-free copper(I) bromide-catalyzed fluoroalkoxylation of unactivated aryl bromides
作者:Ying Guo、Yu-Dao Li、Cheng Chen、Jian-Hong Zhao、Hong-Wei Liu、Dao-Hua Liao、Ya-Fei Ji
DOI:10.1007/s11164-015-2165-4
日期:2016.3
fluoroalkoxylation of unactivated arylbromides has been developed, with special attention focused on practicability of the reaction. Without precious metal and organic ligand, the reaction was carried out under the catalytic system of inexpensive copper(I) bromide as a catalyst, N,N -dimethyl formamide as a cocatalyst, and the corresponding stoichiometric sodium fluoroalkoxide as a nucleophilic reagent.