Ring transformation of 6H-cyclopropa[e]pyrazolo[1,5-a]pyrimidine. IV (1). Reduction and reaction of 5a-acetyl-6a-ethoxycarbonyl-5a,6a-dihydro-6H-cyclopropa[e]pyrazolo[1,5-a]pyrimidine-3-carbonitriles with primary amines
✍ Scribed by Takushi Kurihara; Keiko Nasu; Tsutomu Tani
- Book ID
- 112126735
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1982
- Tongue
- English
- Weight
- 377 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0022-152X
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📜 SIMILAR VOLUMES
Single-crystal X-ray study T = 143 K Mean '(C±C) = 0.004 A Ê R factor = 0.054 wR factor = 0.146 Data-to-parameter ratio = 12.5 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
## Abstract Reaction of 3‐formylchromone (**1**) with 5‐amino‐1__H__‐pyrazoles (**2**) in ethanol, afforded 6‐(2‐hydroxy‐benzoyl)pyrazolo[1,5‐__a__]pyrimidines (**3a‐g**) in good yields. The structures and the regiospecificity of the reaction were established by nmr measurements and X‐ray analysis,