Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
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Reactivity of 2-Methylene-1,3-dicarbonyl Compounds. 1,3-Dipolar Cycloaddition Reaction with Ethyl Diazoacetate
Masashige YAMAUCHI, Masahiko YAJIMA
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Keywords: 2-methylene-1,3-dicarbonyl compound, 1,3-dipolar addition, ethyl diazoacetate, 4,5-dihydro-1H-pyrazole derivative
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2001 Volume 49 Issue 12 Pages 1638-1639

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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.

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© 2001 The Pharmaceutical Society of Japan
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