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The kinetics of nitrogen elimination from 4-alkylidene-Δ1,2-pyrazolines

✍ Scribed by Richard J. Bushby; Michael D. Pollard

Book ID
104246104
Publisher
Elsevier Science
Year
1978
Tongue
French
Weight
115 KB
Volume
19
Category
Article
ISSN
0040-4039

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✦ Synopsis

Recent studies of the pyrolysis of the 4-alkylidene-A '92 -pyraaolines' suggest that

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A Convenient New Synthesis of 4-Alkylidene-3,3,5,5-Tetramethyl-Δ1,2-Pyrazolines. Potential Precursors of T.M.M.
✍ Richard J. Bushby; Michael D. Pollard 📂 Article 📅 1977 🏛 Elsevier Science 🌐 French ⚖ 73 KB

Probably the best precursors for T .M .M. biradicals (l and derivatives thereof) are the 4-alkylidene-A1 ' 2-pyrazolines first studied by Dowd 1 . Unfortunately the parent system 2 tends to undergo isomerisation1 ' 2 to give conjugated dienes, such as 3, and this may compete with the desired elimina