Facile Synthesis of 6-Aryl 5-<i>N</i>-Substituted Pyridazinones: Microwave-Assisted Suzuki−Miyaura Cross Coupling of 6-Chloropyridazinones
作者:Ping Cao、Junya Qu、George Burton、Ralph A. Rivero
DOI:10.1021/jo801097v
日期:2008.9.19
was carried out by using a palladium-catalyzed Suzuki-Miyaura cross coupling of 6-chloro-5-dialkylaminopyridazinone 1 with various arylboronic acids (3 equiv) as the key transformation. The Suzuki-Miyauracross-coupling reaction proceeded smoothly under microwaveirradiation at 135-140 degrees C for 30 min with 5 mol % of Pd catalyst in moderate to good isolated yields. The use of a CombiPhos Pd6 mixture