FIELD: synthesis of nizergoline. SUBSTANCE: the product: bromonicotinic acid, mp 182 C. Reagent 1: nicotinic acid. Reagent 2: thionyl chloride. Reagent 3: bromine. Reaction conditions: in the presence of powdery; iron in an amount of 0.5-5.0 wt of the weight of nicotinic acid for 6 hours. EFFECT: more efficient preparation process.
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| PROCESS FOR PREPARING 2,2,-BIS-(3,5-DIBROMO-4- HYDROBYPHENYL) PROPANE |
1992 |
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| 1R,3S-2,2- DIMETHYL -3(2-METHYL -2- OXYPROPYL) -CYCLOPROPANECARBONITRILE AS INTERMEDIATE COMPOUND IN SYNTHESIS OF PYRETHROIDE INSECTICIDE - DELTAMETRINE AND METHOD FOR PRODUCING INTERMEDIATE COMPOUND |
1989 |
- Rukavishnikov A.V.
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| METHOD OF SYNTHESIS CHLOROAZINES CONTAINING O-HYDROXYPHENYL GROUP |
1991 |
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- Nikolaenkova E.B.
- Mamaev V.P.
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RU2026295C1 |
| 1S,3R - 2,2 - DIMETHYL -3(2-METHYL -2- OXYPROPYL) -CYCLOPROPANECARBONITRILE AS INTERMEDIATE COMPOUND IN SYNTHESIS OF PYRETHROID INSECTICIDE OF DELTAMETRINE AND METHOD FOR PRODUCTION OF INTERMEDIATE COMPOUND |
1989 |
- Rukavishnikov A.V.
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RU1679761C |
| PROCESS FOR PREPARING 1R, 3S-2,2-DIMETHYL-3-(2- OXOPROPYL)CYCLOPROPANEACETONITRILE |
1989 |
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RU1689376C |
| METHOD OF SYNTHESIS OF 3-ALKOXYCARBONYL-4-HYDROXY-2-METHYL-2H- -1,2-BENZOTHIAZINE-1,1-DIOXIDES |
1993 |
- Medvedeva A.S.
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RU2109738C1 |
| METHOD OF OBTAINING 4-AMINOBEZOLFURANE |
1984 |
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| 4-HYDROXY-2,6-DIHYDROXYIMINOCYCLOHEXANONE AS A PARENT PRODUCT FOR SYNTHESIS OF 4-HYDROXYBENZOFURAZAN, AND A METHOD OF 4-HYDROXYBENZOFURAZAN SYNTHESIS |
1987 |
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RU1589598C |
| CYCLOPROPANECARBOXYLIC ACID PYRAZOLIDES IN THE FORM MIXTURE OF DIASTEREOMERS AS INTERMEDIATE COMPOUNDS FOR PREPARATION PYPETROIDS |
1995 |
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RU2095351C1 |
| METHOD OF 2-METHYL-1,4-NAPHTHOQUIN0NE SYNTHESIS |
1990 |
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