[Cl-].[NH4+].C(O)(C)C.[N+:7]([C:10]1[CH:23]=[CH:22][C:13]([C:14]([CH2:16][C:17]([O:19][CH2:20][CH3:21])=[O:18])=[O:15])=[CH:12][CH:11]=1)([O-])=O>O>[NH2:7][C:10]1[CH:11]=[CH:12][C:13]([C:14]([CH2:16][C:17]([O:19][CH2:20][CH3:21])=[O:18])=[O:15])=[CH:22][CH:23]=1A mixture of 224 g of reduced iron, 13.4 g of ammonium chloride, 1,000 ml of isopropyl alcohol, and 200 ml of water was prepared, and then 237 g of ethyl p-nitrobenzoylacetate was added thereto in small amounts at temperatures ranging between 50° and 70° C. They were reacted at 70° C. for 1 hour and then the reaction solution was filtered. Then, 1,000 ml of water was added to the filtrate and cooled to 5° C., and crystals precipitated were collected by filtration to yield 172 g of yellow ethyl p-aminobenzoylacetate crystals, m.p., 82°-4° C.
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