Facile benzannulation of isocoumarins in the efficient synthesis of diversified 1,3-disubstituted isoquinolines
作者:P. Manivel、K. Prabakaran、F. Nawaz Khan、Jong Sung Jin
DOI:10.1007/s11164-011-0351-6
日期:2012.2
An efficient and facile one-pot synthesis of 1,3-disubstituted isoquinolines 3 was accomplished from 3-substituted isocoumarins 1 through diketones, formed in situ via the Grignard reaction, in the presence of ammonium acetate, montmorillonite K-10 catalyst, and ethanol solvent. R = Phenyl, 4-chlorophenyl, 4-methylphenyl R′ = phenyl, methyl, isopropyl, cyclopentyl, cyclohexyl, 3-methoxyphenyl, 2,4-dichlorphenyl,benzyl, biphenyl, 4-pyridyl .
一种高效且简便的单锅合成方法成功地将1,3-二取代的异喹啉3从3-取代的异香豆素1合成而成,该过程中通过Grignard反应原位形成二酮,反应在醋酸铵、蒙脱石K-10催化剂和乙醇溶剂的存在下进行。R = 苯基、4-氯苯基、4-甲基苯基;R′ = 苯基、甲基、异丙基、环戊基、环己基、3-甲氧基苯基、2,4-二氯苯基、苄基、联苯、4-吡啶基。