FIELD: organic synthesis. SUBSTANCE: product: imidodiacetonitrile. Reagent 1: hexamethylenetetramine or ammonia. Reagent 2: hydrogen cyanide. Reaction condition: aqueous medium, in the presence of inorganic acid, at temperature range from 50 C to boiling point, pH of reaction medium is made up to 5.5-10, and reaction mass is heated up to 50-100 C for time that is sufficient for by-products conversion. EFFECT: improved method of synthesis. 4 cl
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| METHOD OF SYNTHESIS OF LOWER ALKYL OXY- OR THIO-DERIVATIVES 4-(LOWER ALKYL)-2,6-BIS-(TRIFLUOROMETHYL)-(DIHYDRO- OR TETRAHYDRO)-PYRIDINE-3,5-DICARBOXYLIC ACIDS |
1991 |
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| METHODS OF IMINODIACETIC ACID MONOSODIUM SALT CONCENTRATED AQUEOUS SOLUTION AND N-PHOSPHONOMETHYLIMINODIACETIC ACID PREPARING |
1997 |
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1995 |
- Cheng Brajan Kaj-Ming
- Ehbner Dzherri Rudol'F
- Stern Majkl Kit
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1998 |
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| METHOD OF BENZOYLUREA DERIVATIVES SYNTHESIS |
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SU1795969A3 |
| METHOD OF SYNTHESIS OF S,S-DI(LOWER ALKYL)-ESTER OF 4-(LOWER ALKYL)-2,6-BIS- (TRIFLUOROMETHYL)-2,6-DIHYDROXY-3,5-PIPERIDINE DICARBOTHIOACID |
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1992 |
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RU2102381C1 |
| METHOD OF SYNTHESIS OF 2-PIPERAZINONES |
1990 |
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RU2036910C1 |
| SUPPORTED CATALYST, METHOD OF PREPARING CATALYST AND METHOD OF PREPARING CARBOXYLIC ACID SALTS |
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RU2157727C2 |
