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Expired
Application number
GB165644A
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Bayer Products Ltd
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Bayer Products Ltd
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Application filed by Bayer Products LtdfiledCriticalBayer Products Ltd
Priority to GB165644ApriorityCriticalpatent/GB571410A/en
Publication of GB571410ApublicationCriticalpatent/GB571410A/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Ethyl p-N-n-butylaminobenzoate is obtained either (a) by n-butylating ethyl p-amino-benzoate with an n-butyl halide in the presence of an acid acceptor such as sodium or potassium carbonate and preferably of a finely-divided metal, e.g. copper or zinc, or (b) by condensing ethyl p-aminobenzoate with n-butyraldehyde and reducing the Schiff's base so formed. Examples relate to (1) heating a mixture of n-butyl bromide, ethyl p-aminobenzoate, anhydrous sodium carbonate, and copper powder under reflux for 8 hours, cooling and treating with water, whereupon the product separates as an oil which solidifies on cooling; (2) heating ethyl p-aminobenzoate with n-butyraldehyde for 1 hour on a steam bath to form the Schiff's base and reducing this by heating under reflux with alcohol, acetic acid and zinc powder.
GB165644A1944-01-281944-01-28Improved manufacture of ethyl p-n-butylamino benzoate
ExpiredGB571410A
(en)
Improvements in or relating to the preparation of chloro-acetoacetamides and to substituted dioxolan derivatives of acetic acid esters as intermediates in said preparation
A procedure for the separation of the isomeros cis and trans of an isomera mixture of replaced cyclohexenes. (Machine-translation by Google Translate, not legally binding)
A procedure for the obtaining of license carbonate of elevated purity, particularly of brutous lyric chloride, in aquatic solution (Machine-translation by Google Translate, not legally binding)