ES371234A1 - Procedure for the preparation of new benzofuran derivatives. (Machine-translation by Google Translate, not legally binding)
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Procedure for the preparation of new benzofuran derivatives. (Machine-translation by Google Translate, not legally binding)
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Novartis AG
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JR Geigy AG
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Priority claimed from CH1342268Aexternal-prioritypatent/CH497066A/en
Application filed by JR Geigy AGfiledCriticalJR Geigy AG
Publication of ES371234A1publicationCriticalpatent/ES371234A1/en
Procedure for the preparation of new benzofuran derivatives, of the general formula I, **(See formula)** in which R1 means hydrogen, a halogen atom up to the atomic number 35, an alkyl group or an alkoxy group with, each time, 2 carbon atoms at most or the nitro group, R2 stands for hydrogen, a halogen atom up to atomic number 35, an alkyl group or an alkoxy group with each having 2 carbon atoms at most, R3 means an alkyl group with 4 carbon atoms at most and R4 and R5 each signify an alkyl group with at most 4 carbon atoms or both signify together with the adjacent nitrogen atom as -NR4R5, the 1-pyrrolidinyl, piperidinic or morpholinic group, and its addition salts with inorganic and organic acids, characterized in that a compound of the general formula II, **(See formula)** in which R1, R2, R3, R4 and R5 and have the significance indicated above, it is exposed under dehydrating conditions and if desired the benzofuran derivative originating from the general formula defined above is transformed into an addition salt with an inorganic or organic acid. (Machine-translation by Google Translate, not legally binding)
ES371234A1968-09-061969-09-05Procedure for the preparation of new benzofuran derivatives. (Machine-translation by Google Translate, not legally binding)
ExpiredES371234A1
(en)
Procedure for the preparation of derivatives of 4-thermoamine-methyl-7-hydroxy-cumarine. (Machine-translation by Google Translate, not legally binding)