ES301483A1 - Procedure for the obtaining of esters of the cumaranil-N-methyl-carbaminic acid. (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the obtaining of esters of the cumaranil-N-methyl-carbaminic acid. (Machine-translation by Google Translate, not legally binding)
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Bayer AG
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Bayer AG
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Publication of ES301483A1publicationCriticalpatent/ES301483A1/en
"Process for obtaining esters of coumaranyl-N-methylcarbaminic acid", characterized in that (a) 7-hydroxy-coumarane of the Formula ** (See formula) ** where R represents hydrogen or methyl, is reacted with methyl isocyanate, or (b) the 7-hydroxy-coumaranos of Formula II in a first step are transformed with an excess of phosgene in the ester of chloroformic acid and this, in a second step, is reacted with methyl amine, or (c) the 7-hydroxy-coumaranos of the Formula II in a first step are reacted with an approximately equimolar amount of phosgene to the corresponding bis- (7-coumaranyl) -carbonate and this, in a second step, is dissociated with amine methylic (Machine-translation by Google Translate, not legally binding)
ES0301483A1963-06-281964-06-27Procedure for the obtaining of esters of the cumaranil-N-methyl-carbaminic acid. (Machine-translation by Google Translate, not legally binding)
ExpiredES301483A1
(en)
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