1,4-Phthalaldehyde

Ƙara 6.0 g na sodium sulfide, 2.7 g na sulfur foda, 5 g na sodium hydroxide da 60 ml na ruwa a cikin wani 250 ml wuyansa flask uku tare da reflux condenser da stirring na'urar, da kuma tayar da zazzabi zuwa 80 ℃ a karkashin motsawa.Ruwan sulfur na rawaya yana narkewa, kuma maganin ya zama ja.Bayan refluxing na 1 h, duhu ja sodium polysulfide bayani an samu.

Ƙara 13.7 g na p-nitrotoluene, 80 ml na ethanol masana'antu, 0.279 g na N, N-dimethylformamide da 2.0 g na urea a cikin 250 ml na kwalban wuyan wuyansa uku tare da faduwa mazugi, reflux condenser da na'urar motsa jiki, zafi da motsawa. don narke p-nitrotoluene don samun maganin rawaya mai haske.Lokacin da aka ɗaga zafin jiki a hankali zuwa 80 ℃ kuma a ci gaba da kasancewa, ana zubar da maganin sodium polysulfide da aka shirya a mataki na sama, kuma maganin da sauri ya juya blue, sannan ya juya duhu kore zuwa launin ruwan kasa, kuma a karshe ya juya launin ruwan kasa.Ana sauke shi a cikin sa'o'i 1.5-2.0, sa'an nan kuma kiyaye shi a 80 ℃ don refluxing dauki na 2 hours.Ana aiwatar da distillation na tururi da sauri.A lokaci guda na distillation, an ƙara 100 ml na ruwa, 150 ml na distillate an tattara, kuma pH darajar shine 7. Ragowar ruwa yana kwantar da ruwa da kankara da sauri don ƙaddamar da lu'ulu'u mai launin rawaya mai haske, wanda aka fitar da ether (30 ml × 5). ), ƙafe da bushe don samun p-aminobenzaldehyde rawaya m.

A zuba 5.89 paraformaldehyde, 13.2 g hydroxylamine hydrochloride da 85 ml ruwa a cikin 250 ml na wuya uku flask, zafi da motsawa don sa su duka su narke don samun bayani mara launi, sannan a ƙara 25.5 g sodium acetate hydrate, kiyaye zafin jiki a 80 ℃ da reflux for Minti 15 don samun formaldehyde oxime (10%) bayani mara launi.

A cikin kwano na 50 ml, ƙara 3.5 g p-aminobenzaldehyde, 10 ml ruwa, sauke 5 ml mai da hankali hydrochloric acid, kuma ci gaba da motsawa.Abun rawaya mai haske yana juyewa baki da sauri kuma yana narkewa gabaɗaya.Yana iya zama mai tsanani mai kyau (kasa da 6 ℃) don narkar da shi duka.Sanya shi a cikin wanka mai gishiri na kankara, kuma zafin jiki ya ragu zuwa ƙasa da 5 ℃.A wannan lokacin, p-aminobenzaldehyde hydrochloride yana haɓaka a matsayin ƙananan ƙwayoyin cuta, kuma maganin ya zama manna.A ƙarƙashin motsawa, 5-10 ℃ 5 ml na maganin sodium nitrite an diga a cikin minti 20, kuma an ci gaba da motsawa na kimanin minti 20.An yi amfani da maganin 40% sodium acetate don daidaita takardar gwajin jan Kongo don zama tsaka tsaki don samun maganin gishiri na diazonium.

Narkar da 0.7 g na crystalline jan karfe sulfate, 0.2 g na sodium sulfite da 1.6 g na sodium acetate hydrate a cikin 10% formaldehyde oxime bayani, kuma maganin ya juya kore.Bayan dripping, ajiye ƙananan zafin jiki na minti 30 don samun maganin launin toka, ƙara 30 ml mai mai da hankali hydrochloric acid, tada zafin jiki zuwa 100 ℃, refluxe na 1 hour, bayani ya bayyana orange, tururi distillation, samun farin dan kadan rawaya m, tace a bushe don samun danyen samfurin p-benzaldehyde.An sake sabunta samfurin tare da gauraye da sauran ƙarfi na 1:1 barasa da ruwa.