FIELD: medicine, as antiischemic and antihypertension agent. SUBSTANCE: 3-ethyl-5-methyl-(±)2-/2-(N-triphenylmethylamino)- -ethoxymethyl/-4-2(-chlorophenyl)1,4- dihydro-6-methyl-3,5-pyridine dicarboxylate is used as reagent 1, benzene sulfoacid being used as reagent 2. Reaction is carried out in methanol or in aqueous-methanol medium at temperature from 20 C to boiling point. Melting point of desired compound is 201 C. EFFECT: improved efficiency. 3 cl
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Year |
Author |
Number |
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- Sandi Borizhek[Si]
- Dar'Ja Jereb[Si]
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1999 |
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| METHOD OF ISOLATION OF CLAVULANIC ACID |
1995 |
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