High stereoselectivity synthesis of <i>Z</i>-3-methyleneisoindolin-1-ones on a Cu/ETS-10 catalyst <i>via</i> domino coupling–cyclization without the use of protective groups and ligands
product synthesis. Herein, we report a novel strategy that uses basic ETS-10 zeolite-supported copper (Cu/ETS-10) as a catalyst for the highly selective synthesis of Z-3-methyleneisoindolin-1-ones in the absence of ligands. It was found that the rigidity of the zeolite skeleton was conducive to the high configurational selectivity of the product. The Cu/ETS-10 catalyst was easily recovered by simple filtration
Copper-Catalyzed Selective Synthesis of Isoindolin-1-ones and Isoquinolin-1-ones from the Three-Component Coupling of 2-Halobenzoic Acid, Alkynylcarboxylic Acid and Ammonium Acetate
作者:Francis Mariaraj Irudayanathan、Jieun Noh、Jinseop Choi、Sunwoo Lee
DOI:10.1002/adsc.201400451
日期:2014.11.3
AbstractIsoindolin‐1‐ones and isoquinolin‐1‐ones were selectively synthesized from the reaction of 2‐halobenzoic acid, arylalkynylcarboxylic acid and ammonium acetate (NH4OAc) in the presence of cesium carbonate (Cs2CO3) and a copper catalyst. Conducting the reaction under one‐pot conditions provided isoindolin‐1‐ones in good yields. Changing the addition sequence of ammonium acetate after all reagents had reacted at 120 °C for 6 h selectively produced isoquinolin‐1‐ones. A variety of arylalkynylcarboxylic acids produced the corresponding isoindolin‐1‐ones and isoquinolin‐1‐ones in good yields.magnified image