| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to method of obtaining 3,4'-diamino-4-R-benzhydrols of general formula . Where R1=Cl (1); R1=Br (2); R1= (3), which are used as semi- products in synthesis of nitrogen dyes, consisting in simultaneous reduction of nitro- and carbonyl groups of respective dinitrobenzophenons of general formula . Where: R1=Cl; R1=Br; , reduction system Zn-NaBH4 in alcohol with mole substratum ratio: zinc: sodium tetrahydroborate equals 1:6:0.5. ^ EFFECT: reduction of synthesis cost, reduction of time and temperature of process carrying out, increase of target product output. ^ 1 cl, 2 tbl, 3 ex |
