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Expired
Application number
GB917/41A
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Chinoin Private Co Ltd
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Chinoin Gyogyszer es Vegyeszeti Termekek Gyara Zrt
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Application filed by Chinoin Gyogyszer es Vegyeszeti Termekek Gyara ZrtfiledCriticalChinoin Gyogyszer es Vegyeszeti Termekek Gyara Zrt
Publication of GB606095ApublicationCriticalpatent/GB606095A/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Vitamin B1 is produced by subjecting 2-methyl-4-amino-5-thioformamidomethyl-pyrimidine to the action of 2-methyl-2-hydroxy-3-halogen-tetrahydrofuranes (g -aceto-g -halogenpropyl alcohols) in the presence of salts of weak tertiary bases with strong acids, e.g. pyridine, quinoline and dimethylaniline as weak tertiary bases and halide acids, strong mineral acids or organic acids such as benzene sulphonic acid as the acid components. Preferably, the reaction is carried out between 50-110 DEG C. The salts of weak bases and strong acids may be employed in sufficient quantities to act as solvent. Detailed examples are given in which pyridine hydrochloride, quinoline hydrochloride and dimethylaniline hydrochloride are used as salts of weak bases with strong acids. Specifications 471,416 and 496,726 are referred to.
GB917/41A1940-01-251941-01-23A process for the production of vitamin b
ExpiredGB606095A
(en)
Process for the production of diene adducts, in particular of derivatives of hydrophthalic acid, tetrahydrobenzoic acid, endovinylcyclohexanedicarboxylic acid or naphthoquinone
A process for the preparation of unsaturated derivatives of 2-methyl-2-hydroxy-3-halogen-teterahydrofurane and for their conversion to vitamin b and the like