5-Nitro-chromono-(3′,2′-3,4)-cinnolin
✍ Scribed by Prof. Dr. G. Wurm
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- English
- Weight
- 85 KB
- Volume
- 308
- Category
- Article
- ISSN
- 0365-6233
No coin nor oath required. For personal study only.
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## Abstract The isomeric compounds 5,6‐dihydrothieno[2,3‐__h__]cinnolin‐3(2__H__)‐one (7a) and 5,6‐dihydrothieno‐[3,2‐__h__]cinnolin‐3(2__H__)‐one (7b) rapidly tautomerise to the corresponding 1,4‐dihydrothienocinnolinones 8a,b when kept in refluxing hydrazine hydrate. With longer reaction times th
Synthesis and Biological Activity of Some 4-Amino-3-cinnoline Carboxylic Acid Derivatives. Part 4. 2,4-Dioxo-1,2,3,4tetrahydropyrimido[5,4-c]cinnolines. -A new series of the title compounds (III) are prepared by cyclocondensation of the corresponding cinnolinecarboxamides (I) with oxalyl chloride,