A General and Mild Copper-Catalyzed Arylation of Diethyl Malonate
摘要:
GRAPHICSA general method for the synthesis of alpha-aryl malonates is described. The coupling of an aryl iodide and diethyl malonate in the presence of Cs2CO3 and catalytic amounts of copper(I) iodide and 2-phenylphenol affords the alpha-aryl malonate in good to excellent yields. The mild reaction conditions and high levels of functional group compatibility make this an attractive synthetic alternative to previous methods.
Self‐Sustaining Fluorination of Active Methylene Compounds and High‐Yielding Fluorination of Highly Basic Aryl and Alkenyl Lithium Species with a Sterically Hindered
<i>N</i>
‐Fluorosulfonamide Reagent
作者:Yuhao Yang、Gerald B. Hammond、Teruo Umemoto
DOI:10.1002/anie.202211688
日期:2022.10.24
By developing a sterically hindered fluorinating agent, N-fluoro-N-(tert-butyl)-tert-butanesulfonamide (NFBB), we discovered a conceptually novel base-catalyzed, self-sustaining fluorination of active methylene compounds and achieved an unprecedented high-yield fluorination of highly basic (hetero)aryl and alkenyl lithium species.
Copper-catalyzed [3+2] annulation of <i>O</i>-acyl ketoximes with 2-aryl malonates for the synthesis of 3-aryl-4-pyrrolin-2-ones
作者:Xiao-Qing Song、Xiao-Qi Qiang、Zi-Jun Hu、Xinyu Lyu、Sheng Tan、Changsheng Yao、Yong-Qiang Sun、Chun-Bao Miao、Hai-Tao Yang
DOI:10.1039/d3cc00367a
日期:——
A copper-catalyzed [3+2] annulation of O-acyl ketoximes with 2-aryl malonates for the concise synthesis of 3-aryl-4-pyrrolin-2-ones has been developed. The advantage of this method lies in the use of O-acyl oximes as an internal oxidant to generate the nucleophilic enamines and electrophilic p-quinone methides concurrently. The subsequent nucleophilic addition undergoes selectively on the α-C of malonates