A highly efficient green synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-dione derivatives and their photophysical studies
作者:Dushyant Singh Raghuvanshi、Krishna Nand Singh
DOI:10.1016/j.tetlet.2011.08.111
日期:2011.10
for an efficientsynthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones by one-pot cyclocondensation reaction of phthalhydrazide, aromatic aldehydes, and malononitrile or ethyl cyanoacetate under microwave irradiation. The advantages of this method include the use of green catalyst, no organic solvent, easy work-up and excellent yields. The photophysical properties for some 1H-pyrazolo[1,2-b]phthalazine-5
特定任务的离子型液体,[BMIM] OH,已被用于为1的有效合成ħ -吡唑并[1,2- b ]酞嗪-5,10-二酮通过邻苯二甲酰的一锅反应环化缩合,芳族醛,微波辐射下的丙二腈或氰基乙酸乙酯。该方法的优点包括使用绿色催化剂,不使用有机溶剂,易于后处理和优异的收率。首次研究了一些1 H-吡唑并[1,2 - b ]酞嗪-5,10-二酮衍生物的光物理性质。
An efficient and high-yielding one-pot synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones catalyzed by sodium hydrogen carbonate under solvent-free conditions
Sodium hydrogen carbonate, NaHCO 3 , efficientlycatalyzes the one-pot, three-component reaction of phthalhydrazide, an aromatic aldehyde, and malononitrile or ethyl cyanoacetate under solvent-free conditions, to afford the corresponding 1H-pyrazolo[1,2-b]phthalazine-5,10-diones in high yields. Easy work up, inexpensive and readily available catalyst and avoiding the use of harmful organic solvents