An Efficient and Facile Synthesis of 1<i>H</i>-Pyrazolo[1,2-<i>b</i>]phthalazine-5,10-dione Derivatives of Biological Interest
作者:Nimesh M. Shah、Manish P. Patel、Ranjan G. Patel
DOI:10.1002/jhet.918
日期:2012.11
A simple and efficient method has been developed for the synthesis of 1H‐pyrazolo[1,2‐b]phthalazine‐5,10‐dione derivatives through a one‐pot three‐component condensation reaction of 2‐chloro‐3‐formyl quinolines, malononitrile/ethyl cyanoacetate and 2,3‐dihydro‐1,4‐phthalazinedione using a catalytic amount of piperidine in refluxing ethanol. All the synthesized compounds were screened for their antibacterial activity against a panel of pathogenic strains of bacteria and fungi.
DMAP as a new efficient catalyst for the one-pot synthesis of condensed phthalazines
作者:Esma Lamera、Sofiane Bouacida、Hocine Merazig、Aissa Chibani、Marc Le Borgne、Zouhair Bouaziz、Abdelmalek Bouraiou
DOI:10.1515/znb-2016-0262
日期:2017.5.1
Abstract A new, convenient, and efficient method for the synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones is developed starting from phthalhydrazide, aromatic aldehydes, and malononitrile using 4-N,N-dimethylaminopyridin as catalyst. This modified route provides much higher yields and a simple work-up procedure of products. Also this methodology is of interest due to the use of ethanol as a solvent