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Wyeth LLC
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American Home Products Corp
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Priority to ES0327409ApriorityCriticalpatent/ES327409A3/en
Publication of ES327409A3publicationCriticalpatent/ES327409A3/en
Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms
(AREA)
Abstract
A process for producing N-substituted 2-amino-benzophenones, characterized in that a 2-acyloxymethyl-3,1,4H-benzoxazin-4-one of the formula ** (See formula) ** wherein R1 and R2 are hydrogen, alkyl or lower alkyl, R3 is an acyl group and ring A may or may not be substituted, (wherein 2-acyloxymethyl-3, 1,4H-benzoxazin-4-one is conveniently prepared reacting an anthranilic acid with a 2-acyloxyacetylating agent followed by cyclization of N- (21-acyloxyacyl) -anthranilic acid, for example with a dehydrating agent), is reacted with an arylating agent, for example an aryl Grignard agent to give a 2-acyloxyacetamido phenyl aryl ketone of the formula ** (See formula) ** where Ar is the aryl group contained in the arylating agent. (Machine-translation by Google Translate, not legally binding)
ES0327409A1966-06-011966-06-01A procedure to produce N-substitute 2-amino-benzofenones. (Machine-translation by Google Translate, not legally binding)
ExpiredES327409A3
(en)