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Substituent effects in reactions of benzenes with 5-tert-butyl-3H-pyrazolylidene

✍ Scribed by W.L. Magee; H. Shechter

Book ID
104238022
Publisher
Elsevier Science
Year
1979
Tongue
French
Weight
294 KB
Volume
20
Category
Article
ISSN
0040-4039

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✦ Synopsis

The effects of substituents on the conversions of benzenes by 5-tert-butyl-3flpyrazolylidene to (substituted phenyl)pyrazoles and pyrazolo[l,5-+]azocines are described.

5-Dart-butyl-3E-pyrazolylidene (L), as derived from thermolysis of 3-tert-butyl+-diazopyrazole,ia effects substitution and ring-expansion (Eq 1) of benzene (;1c) to T(5)-tert-butyl-5(T)-phenylpyrazole (& 85-94) and 2-tert-butylpyrazolo[l,5-a]aeocine (k, 5-l@; a new heterocyciic system),

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