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Synthesis of 5-ethyl-1,3,8-trimethyl-1H-[5-14C] imidazo[1,2-c]pyrazolo[3,4-e]pyrimidine

โœ Scribed by J. L. Hicks; C. C. Huang


Publisher
John Wiley and Sons
Year
1985
Tongue
French
Weight
246 KB
Volume
22
Category
Article
ISSN
0022-2135

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Synthesis of some pyrazolo[1,5-c][1,3]be
โœ Jan Svetlik; Nada Pronayova; Jiri Kubista ๐Ÿ“‚ Article ๐Ÿ“… 2005 ๐Ÿ› Journal of Heterocyclic Chemistry ๐ŸŒ English โš– 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