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Pfizer Inc
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Pfizer Inc
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Priority to ES421073ApriorityCriticalpatent/ES421073A3/en
Publication of ES421073A3publicationCriticalpatent/ES421073A3/en
Low-Molecular Organic Synthesis Reactions Using Catalysts
(AREA)
Abstract
A method for preparing quinoxaline-di-k-oxides, of the formula: ** (see formula) ** Wherein x is a substituent in the 6 or 7 position, and is selected from the group comprising hydrogen, methyl, methoxy, trifluoromethyl, bromine, chlorine and fluorine; and it is chosen from hydrogen and alkyl containing 1 to 3 carbon atoms; characterized in that it comprises reacting a quinoxaline-di-N-oxide of the formulas: ** (see formula) ** Wherein x is as defined above, r is alkyl containing 1 to 3 carbon atoms and y is chosen from bromine and chlorine, and with an amine of the formula: R1nh2 In which r1 is as defined above. (Machine-translation by Google Translate, not legally binding)
ES421073A1973-12-011973-12-01
A METHOD FOR PREPARING QUINOXALINADI-N-OXIDES.
ExpiredES421073A3
(en)
A procedure for preparing substituted benzoic acid dimetilsulfoxidos and dimetilsulfonas. (Machine-translation by Google Translate, not legally binding)