Novel synthesis of highly functionalized pyrazolone systems via rearrangement of 5-phenyl-1-oxa-5,6-diazaspiro[2.4]heptane-4,7-diones
作者:S. A. M. Metwally、T. A. Mohamed、O. S. Moustafa、Y. A. El-Ossaily
DOI:10.1007/s10593-011-0671-x
日期:2011.2
Epoxidation of 4-alkylidene(arylidene)-1-phenyl-3,5-pyrazolidinediones using alkaline hydrogen peroxide gave the corresponding 5-phenyl-1-oxa-5,6-diazaspiro[2.4]heptane-4,7-dione derivatives. Their reaction with nucleophilic reagents was investigated. The resulting products depend on the type of the diazaspiro compound and/or the nucleophile used.
Hussein, Essam M.; Abdel-Monem, Maisa I., ARKIVOC, 2011, vol. 2011, # 10, p. 71 - 84
作者:Hussein, Essam M.、Abdel-Monem, Maisa I.
DOI:——
日期:——
Green synthetic investigation and spectral characterization of some spiro pyrazolidine‐based heterocycles with potential biological activity
作者:Yasser A. El‐Ossaily、Saoud A. Metwally、Nayef S. Al‐Muailkel、Ahmed Fawzy、Hazim M. Ali、Yousra A. Naffea
DOI:10.1002/jhet.3898
日期:2020.4
A green, rapid, and efficient methodology is developed for the synthesis of 1‐phenyl‐3,5‐pyrazolidinedione (3) by the reaction of malonic acid with phenyl hydrazine in the presence of phosphorous oxychloride under solvent‐free conditions. The later compound 3 was used as a versatile precursor for green synthesis of chalcone derivatives (4a‐h) and spiroheterocyclic compounds (5a‐h) with good to excellent