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Expired
Application number
GB3436659A
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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 GB900396ApublicationCriticalpatent/GB900396A/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Threo-b -(p-nitrophenyl) serine is prepared by reacting the potassium salt of glycine with more than one mole of p-nitrobenzaldehyde per mole of glycinate, in aqueous alcohol at a temperature over 20 DEG C. in the presence of potassium carbonate and setting free the carboxylic acid from the salt obtained by treatment with mineral acid. In examples 2 mols p-nitrobenzaldehyde in ethanol are added to an aqueous solution of 1 mol of potassium glycinate, anhydrous potassium carbonate added, the mixture stirred at 30-35 DEG C. and the resulting salt acidified with concentrated hydrochloric acid.
GB3436659A1958-10-101959-10-09A process for the preparation of threo-ª--(p-nitrophenyl)-serine
ExpiredGB900396A
(en)