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Expired
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GB21435/61A
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Individual
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Individual
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Publication of GB891478ApublicationCriticalpatent/GB891478A/en
Pharmaceuticals Containing Other Organic And Inorganic Compounds
(AREA)
Abstract
The invention comprises compounds of the general formula <FORM:0891478/IV (b)/1> wherein R11 and each R represent hydrogen atoms or C1-6 alkyl groups and R1 represents a C1-6 alkyl group, and the preparation thereof where R11 is a hydrogen atom by reacting a compound of the formula <FORM:0891478/IV (b)/2> wherein X is a chloro or bromo atom, with a compound of the formula <FORM:0891478/IV (b)/3> The compounds in which R11 is an alkyl group may be prepared by appropriate N-alkylations.