Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Merck and Co Inc
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Merck and Co Inc
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Publication date
Application filed by Merck and Co IncfiledCriticalMerck and Co Inc
Priority to ES439382ApriorityCriticalpatent/ES439382A2/en
Publication of ES439382A2publicationCriticalpatent/ES439382A2/en
Improvements introduced in the object of the main patent no. 415,678 by: a process for the preparation of new oxazolopyridine derivatives, of the formula: ** (see formula) ** Where n is an integer from 1 to 3, the substituents x may be the same or different and X is (a) lower alkyl, (b) lower alkoxy, (c) halogen or (d) trifluormetilo y R 'is hydrogen or lower alkyl, whose improvements are characterized by heating at 130-230º c, for 5 minutes up to about one hour, a mixture of compounds i and ii and polyphosphoric acid: ** (see formula) ** (Machine-translation by Google Translate, not legally binding)
ES439382A1975-07-141975-07-14
A PROCEDURE FOR THE PREPARATION OF NEW OXAZOLOPYRIDINES DERIVATIVES.
ExpiredES439382A2
(en)