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Reactivity of 2-methylene-1,3-dicarbonyl compounds. 1,3-dipolar cycloaddition reaction with ethyl diazoacetate
1Faculty of Pharmaceutical Sciences, Josai University, Sakado, Saitama, Japan. yamauchi@josai.ac.jp
Chemical & Pharmaceutical Bulletin
|January 5, 2002
Abstract:
The reaction of 2-methylene-1,3-dicarbonyl compounds (1) with ethyl diazoacetate gave 4,5-dihydro-1H-pyrazole derivatives (2), which were stable for several months at room temperature in good yields.