ES267453A1 - Procedure for the preparation of a sulfurous derivative of vitamin b (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the preparation of a sulfurous derivative of vitamin b (Machine-translation by Google Translate, not legally binding)
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Merck KGaA
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E Merck AG
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Publication of ES267453A1publicationCriticalpatent/ES267453A1/en
Process for the preparation of a sulphurous derivative of vitamin B6, characterized by reacting an acid addition salt of 3,4-bis-bromo-methyl-5-hydroxy-6-methyl-pyridine in aqueous solution with a sulfide or water-soluble inorganic hydrogensulfide, preferably with alkali or ammonium sulphide or hydrogensulfide, and by isolating from the reaction mixture, by the usual methods, bis- [4-hydroxymethyl-5-hydroxy-6-methyl-pyridyl- (3) - methyl] -sulfur thus obtained. (Machine-translation by Google Translate, not legally binding)
ES0267453A1960-05-181961-05-17Procedure for the preparation of a sulfurous derivative of vitamin b (Machine-translation by Google Translate, not legally binding)
ExpiredES267453A1
(en)
A procedure to reduce the trend of ammonium and potassic sulphates to the formation of terrones (Machine-translation by Google Translate, not legally binding)
A procedure to reduce the trends to the formation of terrones of potassic sulfate or of ammonium sulphate (Machine-translation by Google Translate, not legally binding)
An improvement introduced in the methods for the reduction of nitrociclohexane to oxima of ciclohexanona (Machine-translation by Google Translate, not legally binding)