반응 #62863
ord-71c923af91b64034a7eea64cf3aa16cc
반응 방정식
반응 조건
상세 조건
See reaction.notes.procedure_details.
후처리
- 1기타The solid which has precipitated
- 2기타is isolated
- 3기타dried
실험 절차
43 g of 2,5-dichloro-4-methyl-3-nitrobenzoic acid and 108.8 g of Na2S2O4 are boiled in a mixture of 340 ml of glycol monomethyl ether and 340 ml of water for 3 hours. 480 ml of 1/2-concentrated HCl are added to the still warm solution and the mixture is then boiled up once again. After cooling to room temperature, the mixture is poured into 1 l of ice-water and the strongly acid solution is buffered with Na2CO3 (pH 5). The solid which has precipitated is isolated and dried. Melting point: 218°-21°, yield: 32.5 g.