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-Miyaura cross-coupling reaction proceeded smoothly under microwave irradiation 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
通过使用钯催化的6-氯-5-二烷基氨基哒嗪酮1的钯催化的Suzuki-Miyaura交叉偶联,从5,6-二氯哒嗪酮轻松合成5-二烷基氨基-6-芳基-(2H)-哒嗪-3-酮以各种芳基硼酸(3当量)作为关键转化。Suzuki-Miyaura交叉偶联反应在微波辐射下,在135-140℃下用5 mol%的Pd催化剂进行30分钟的分离,收率中等至良好。评估了CombiPhos Pd6混合催化剂系统和单个Pd-SPhos催化剂系统的使用。