ES248357A1 - A method for the preparation of basic substitute tiaxyanins (Machine-translation by Google Translate, not legally binding)
- Google Patents
A method for the preparation of basic substitute tiaxyanins (Machine-translation by Google Translate, not legally binding)
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Kefalas AS
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Kefalas AS
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Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms
(AREA)
Abstract
Method for the preparation of thiaxanthenes with basic substituents of the formula: ** (See formula) ** wherein R represents hydrogen, halogen or a methoxyl group and salts thereof by addition of acid, characterized by reacting compounds of the formula: ** (See formula) ** wherein R has the above meaning, with a dehydrating agent and reacting the resulting unsaturated compound with a methylating agent, or with an agent that acts as a dehydrating and methylating agent, after which the dioxanthene is isolated from the reaction as such or in salt form by the addition of acid and, in the case where R represents halogen or a methoxyl group, the trans isomer is isolated by fractional crystallization. (Machine-translation by Google Translate, not legally binding)
ES0248357A1958-10-071959-04-01A method for the preparation of basic substitute tiaxyanins (Machine-translation by Google Translate, not legally binding)
ExpiredES248357A1
(en)
A procedure for preparing new therapeutic compounds in the form of free base or acidal salts of non-toxic addiction (Machine-translation by Google Translate, not legally binding)