反应详情

At a temperatutre of 80° C, hydrazine is allowed to act -- in the presence of Raney nickel -- on 18.2 parts by weight of 2-nitro-5-amino-4-methoxy-toluene in 100 parts by volume of water, until no nitro compound can be detected any more. The 2-methoxy-5-methyl-1,4-diaminobenzene having been formed is dissolved by an addition of hydrochloric acid up to a pH value of from 2 to 2.5. After filtering off from the Raney nickel, the diamine is monodiazotized at a temperature of from 0° to 5° C in the pH range of from 1.5 to 3.5 with a further addition of hydrochloric acid. Subsequently, the process is carried out according to the specifications of Example 6 and a disazo dyestuff of the formula (XIII) ##STR14## is obtained which dyes polyester fabric in an orange shade.