Synthesis of azulenolactones through sequential C(2)‐bromoarylation and intramolecular CO bond formation from azulene‐1‐carboxylic acids and di(2‐bromoaryl)iodonium salts in
<scp>one pot</scp>
作者:Chanyoung Maeng、Phil Ho Lee
DOI:10.1002/bkcs.12503
日期:2022.4
C(2)-bromoarylation reaction and intramolecular CO bondformation from azulene-1-carboxylic acids and di(2-bromoaryl)iodonium salts produced azulenolactones in one pot. The sequential reaction proceeded smoothly through the copper(I)-mediated cyclization of 2-(2-bromoaryl)azulene-1-carboxylic acids derived from the regioselective iridium(III)-catalyzed C(2)-bromoarylation reaction without decarboxylation
example of directed C–H activation for azulene is reported. A variety of 2-arylazulenes are obtainable exclusively from 1-azulene carboxylicacids, with yields of up to 82%. Some heteroaryl groups such as pyridine and thiophene are also tolerated in the reaction. The efficacy of the reaction is found to be highly dependent on the conditions, with a phosphate base and a bulky carboxylicacid being key
Iridium(III)-Catalyzed Sequential C(2)-Arylation and Intramolecular C–O Bond Formation from Azulenecarboxylic Acids and Diaryliodonium Salts Access to Azulenofuranones
作者:Chanyoung Maeng、Hyung Jin Seo、Haneal Jeong、Kyungsup Lee、Hee Chan Noh、Phil Ho Lee
DOI:10.1021/acs.orglett.0c02607
日期:2020.9.18
herein is the iridium-catalyzed sequential C(2)-arylation reaction and intramolecular C–O bond formationfrom azulenecarboxylic acids and diaryliodonium salts, leading to the formation of 3-arylazulenofuranones. The sequential reaction proceeded smoothly through generation of 2-arylazulene-1-carboxylic acids derived from the iridium-catalyzed regioselective C(2)-arylation reaction without the decarboxylation