A one-pot three-component reaction of ethyl acetoacetate, AcONH4, and different aldehydes has been successfully performed in the presence of ionic liquids (ILs) possessing a (MeO)(2)PO2- counterion. The impact of electronic and steric effects of the substituents of aromatic aldehydes, as well as the influence of different anions of ILs on the product yield, have been investigated. The application of dimethyl phosphate ILs in the synthesis of Hantzsch 1,4-dihydropyridines presents a simple method for obtaining structurally diverse products in moderate to high yields without using any additional catalyst.
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Shangrao Normal Univ, Key Lab Appl Organ Chem, Higher Inst Jiangxi Prov, Shangrao 334001, Peoples R ChinaShangrao Normal Univ, Key Lab Appl Organ Chem, Higher Inst Jiangxi Prov, Shangrao 334001, Peoples R China
Peng, Hua-Nan
Peng, Xiao-Ming
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Nanchang Univ, Dept Chem, Nanchang 330031, Peoples R ChinaShangrao Normal Univ, Key Lab Appl Organ Chem, Higher Inst Jiangxi Prov, Shangrao 334001, Peoples R China
Peng, Xiao-Ming
Zheng, Da-Gui
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Shangrao Normal Univ, Key Lab Appl Organ Chem, Higher Inst Jiangxi Prov, Shangrao 334001, Peoples R ChinaShangrao Normal Univ, Key Lab Appl Organ Chem, Higher Inst Jiangxi Prov, Shangrao 334001, Peoples R China