Quinolone analogues 8 [1-6]. Synthesis of 3-aminopyridazino-[3,4-b]quinoxalin-4(lH)-one
✍ Scribed by Yoshihisa Kurasawa; Ayaka Kawase; Jun Takizawa; Yuka Maesaki; Eisuke Kaji; Yoshihisa Okamoto; Ho Sik Kim
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 2005
- Tongue
- English
- Weight
- 145 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0022-152X
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📜 SIMILAR VOLUMES
Quinolone analogues I -VI with pyridazino [3,4-b]quinoxaline ring system were synthesized from the (1-alkylhydrazino)quinoxaline N-oxides 1 via oxidation of pyridazino [3,4-b] quinoxalines 2,3,5,7, quinoxalino[2,3-c]cinnolines 4, and1,2-diazepino[3,4-b]quinoxalines 6. The biological activities of qu
## Abstract The reaction of the quinoxaline __N__‐oxides **7a,b** with diethyl ethoxymethylenemalonate gave the 1‐methylpyridazino[3,4‐__b__]quinoxaline‐4,4‐dicarboxylates **8a,b**, whose reaction with __N__‐bromosuccinimide or __N__‐chlorosuccinimide afforded the 3‐halogeno‐1‐methylpyridazino[3,4‐
The 3-heteroaryl-1-methylpyridazino [3,4-b]quinoxalin-4(1H)-ones 6a-e were synthesized by the oxidative-hydrolytic ring transformation of the 3-heteroaryl-1,2-diazepino[3,4-b]]quinoxaline-5-carbonitriles 9a-c, which were obtained by the 1,3-dipolar cycloaddition reaction of the 2-(2-heteroarylmethyl