An efficient aerobic oxidative aromatization of Hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazolines

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• 作者：Bing Han ; Zhengang Liu ; Qiang Liu ; Li Yang ; Zhong-Li Liu and Wei Yu
• 关键词：Hantzsch 1 ; 4-dihydropyridines ; 1 ; 3 ; 5-Trisubstituted pyrazolines ; Aerobic oxidative aromatization ; N-Hydroxyphthalimide ; Cobalt diacetate
• 刊名：Tetrahedron
• 出版年：2006
• 出版时间：13 March 2006
• 年：2006
• 卷：62
• 期：11
• 页码：2492-2496
• 全文大小：109 K

文摘

4-Substituted Hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazolines were oxidized to the corresponding pyridines and pyrazoles, respectively, in high yields by molecular oxygen in the presence of catalytic amount of N-hydroxyphthalimide (NHPI) and Co(OAc)₂ in acetonitrile at room temperature.