FIELD: organic chemistry. SUBSTANCE: products - aromatic 1,2-diketones: 1,4-di-(2-phenylethane-1,2-dione-1-yl)-benzene; 1,2-diphenylethane-1,2-dione. Reagent 1: bicyclic bis-ureas of the formula 
where R - Ph, 
, 
. Reagent 2: nitric acid. Reaction conditions: concentrated nitric acid, sulfuric acid, 80-90% aqueous acetic acid, molar ratio of bis-ureas, nitric acid, sulfuric acid is 0.01:(0.06-0.08): (0.03-0.08). Synthesized compounds are used as monomers for thermostable polymers. EFFECT: improved method of synthesis. 3 tbl
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|---|---|---|---|
| METHOD OF SYNTHESIS OF AROMATIC 1,2-DIKETONES | 1990 |
|
RU2021249C1 |
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SU1817764A3 |
