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Substituted 1,10b-dihydro-5H-pyrazolo[1,5-c]-1,3-benzoxazines

✍ Scribed by V. D. Orlov; N. V. Getmanskii; I. A. Oksenich; S. V. Iksanova

Publisher
Springer US
Year
1991
Tongue
English
Weight
392 KB
Volume
27
Category
Article
ISSN
0009-3122

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Synthesis of some pyrazolo[1,5-c][1,3]be
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✍ Jan Svetlik; Nada Pronayova; Jiri Kubista πŸ“‚ Article πŸ“… 2005 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 93 KB

Condensations of 5-(2-hydroxyphenyl)pyrazoline 3a with 4-carboxybenzaldehyde, glyoxylic acid and N,N'-carbonyldiimidazole leading to pyrazolobenzoxazine derivatives were studied. The observed diastereoselectivity is discussed. Reaction of 3a with Lawesson reagent gave rise to a new 5H-pyrazolo[1,5-c