反应详情

0.5 kg (10 mol) hydrazine hydrate was heated with 3.040 kg (20 mol) salicylic acid methyl ester and 2.714 kg vaseline in a protective gas such as nitrogen or argon in the apparatus according to the invention. The water-methanol mixture produced was continuously distilled-off from the reaction mixture. After about three hours, the reaction temperature had risen to 120° C. and approximately half of the quantity of methanol expected theoretically and the entire amount of water were distilled off (0.5 kg). The hydrazide was present in the vaseline as a crystal product in paste. The heating was continued after 30 g boron trioxide was added and the temperature was kept at 150° C. The remaining methanol (0.320 kg) was distilled off. After about three hours, the reaction was complete as determined by the amount of methanol distilled off.

1. customhad risen to 120° C.
2. distillationthe entire amount of water were distilled off (0.5 kg)
3. additionwas added
4. customwas kept at 150° C
5. distillationThe remaining methanol (0.320 kg) was distilled off
6. waitAfter about three hours
7. distillationdistilled off