New process for preparing 3-methyl-4-phenylisoxazolo[3,4-d]pyridazin-7(6H)-one
A process for preparing 3-methyl-4-phenylisoxazolo[3,4-D]pyridazin-7(6H)-one which process comprises the steps of: a) reacting 1 -phenylbutane-1,3-dione with ethyl 2-chloro-2-(hydroxyimino)acetate, b)subsequently reacting the product from step (a) with hydrazine or an hydrate thereof to yield 3-meth...
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Main Authors | , |
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Format | Patent |
Language | Chinese English |
Published |
24.03.2010
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Subjects | |
Online Access | Get full text |
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Summary: | A process for preparing 3-methyl-4-phenylisoxazolo[3,4-D]pyridazin-7(6H)-one which process comprises the steps of: a) reacting 1 -phenylbutane-1,3-dione with ethyl 2-chloro-2-(hydroxyimino)acetate, b)subsequently reacting the product from step (a) with hydrazine or an hydrate thereof to yield 3-methyl-4-phenylisoxazolo[3,4-d]pyridazin-7(6H)-one, wherein step (b) is carried out on the mixture resulting from step (a) without isolating ethyl 14-benzoyl-5-methylisoxazole-3-carboxylate therefrom. |
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Bibliography: | Application Number: CN200880005978 |