| 摘要 |
PURPOSE:To industrially and advantageously obtain the titled compound useful as an intermediate for agricultural chemicals, etc., by reacting novel fluoro- amino-tetrahydroquinoxalin-one with tetrahydrophthalic anhydride. CONSTITUTION:(A) 1mol b-fluoro-7-amino-1,2,3,4-tetrahydroquinoxalin-2-one expressed by formula I is reacted with (B) 3,4,5,6-tetrahydrophthalic anhydride in an amount of preferably 1-1.1mol normally under atmospheric pressure preferably at 80-150 deg.C for 10min-10hr to obtain the aimed compound expressed by formula II. The component (A) as a raw material is a novel substance which can be produced, for example, by chemically or catalytically subjecting N-(2,4- dinitro-5-fluorophenyl)glycine ethyl ester to reductive cyclization.
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