Reaction of 1,2-diamino-4-nitrobenzene with 1,5-diketones. Synthesis and oxidative reactions of nitrobenzimidazoles
✍ Scribed by V. A. Kaminskii; O. Yu. Slabko; M. V. Gomolach
- Publisher
- Springer US
- Year
- 1990
- Tongue
- English
- Weight
- 310 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0009-3122
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Low temperature nitrations of 2-methylimidazole gave in addition to the known 2-methyl-5(4)-nitroimidazole (1), 2-(dinitromethylene)-5,5-dinitro-4-imidazolidinone (3) and parabanic acid (2). The tetranitro compound 3 was also obtained by nitration of 2-methyl-4,5-dihydro-(lH)-5-imidazolone (8). Ther
## Abstract magnified image The compounds 5,6‐dihydro‐4__H__‐imidazo[4,5‐__c__][1,2,5]oxadiazole (**3a**, RH), 4,6,10,12‐tetramethyl‐5,6,11,12‐tetrahydro‐4__H__,10__H__‐bis(1,2,5)oxadiazolo[3,4‐__d__:3′,4′‐__I__][1,3,6,8]tetraazecine (**4b**, RCH~3~), __N__^3^,__N__^3^′‐methylenebis‐3,4‐diamino‐
## Abstract Reaction of 2‐acetonyl‐4,5‐dimethoxy‐3′‐chlorobenzophenone (1) with ethylenediamine afforded the imidazo[2,1‐__a__]isoquinoline 2, whereas 6‐(3‐chlorophenyl)‐8,9‐dimethoxybenzo[__b__]phenazine (3) and naphthol 4 were obtained with __ortho__‐phenylenediamine.