1,4-Phthalaldehyde

Eketsa 6.0 g ya sodium sulfide, 2.7 g ya sulfur powder, 5 g ya sodium hydroxide le 60 ml ya metsi ka har'a 250 ml e meraro ea melapo e nang le reflux condenser le sesebelisoa se susumetsang, 'me u phahamisetse mocheso ho 80 ℃ ha u ntse u tsosoa.Phofo e Yellow sulfur e qhibiliha, 'me tharollo e fetoha khubelu.Ka mor'a ho reflux bakeng sa 1 h, ho fumanoa tharollo ea sodium polysulfide e bofubelu bo lefifi.

Kenya 13.7 g ya p-nitrotoluene, 80 ml ea ethanol ea indasteri, 0.279 g ya N, N-dimethylformamide le 2.0 g ya urea ka har'a 250 ml ka har'a flask e nang le melapo e meraro e nang le fereko e rothang, condenser ea reflux le sesebelisoa se hlohlelletsang, mocheso le ho sisinyeha. ho qhaqha p-nitrotoluene ho fumana tharollo e mosehla o bobebe.Ha mocheso o nyoloha butle-butle ho 80 ℃ 'me o lula o le teng, tharollo ea sodium polysulfide e lokiselitsoeng mohatong o ka holimo ea theoha,' me tharollo e fetoha e putsoa ka potlako, ebe e fetoha botala bo lefifi ho ea ho sootho, 'me qetellong e fetoha bofubelu bo bofubelu.E theoha nakong ea lihora tse 1.5-2.0, ebe e bolokoa ho 80 ℃ bakeng sa karabelo ea refluxing ka lihora tse 2.Steam distillation e etsoa ka potlako.Ka nako e ts'oanang ea distillation, metsi a 100 ml a kenngoa, 150 ml ea distillate e bokelloa, 'me pH ea bohlokoa ke 7. Mokelikeli o setseng o pholile ka leqhoa ka potlako ho fokotsa likristale tse mosehla tse khanyang, tse ntšoang ka ether (30 ml × 5). ), e fetoha mouoane le ho omisoa ho fumana p-aminobenzaldehyde e tiileng e mosehla.

Kenya 5.89 paraformaldehyde, 13.2 g hydroxylamine hydrochloride le 85 ml ea metsi ka har'a 250 ml e nang le botlolo e nang le melapo e meraro, futhumatsa le ho hlohlelletsa ho etsa hore li qhibilihe kaofela ho fumana tharollo e se nang mebala, ebe u eketsa 25.5 g sodium acetate hydrate, boloka mocheso ho 80 ℃ le reflux bakeng sa 15 min ho fumana formaldehyde oxime (10%) tharollo e se nang mebala.

Ka bekeng ea 50 ml, eketsa 3.5 g p-aminobenzaldehyde, 10 ml ea metsi, theola 5 ml concentrated hydrochloric acid, 'me u lule u hlohlelletsa.Ntho e 'mala o mosehla o khanyang o fetoha o motšo ka potlako' me o qhibiliha ka ho tsoelang pele.E ka futhumatsoa hantle (ka tlase ho 6 ℃) ho e qhaqha kaofela.E pholile ka bateng ea letsoai la leqhoa, 'me mocheso o theohela ka tlase ho 5 ℃.Ka nako ena, p-aminobenzaldehyde hydrochloride precipitates e le likaroloana tse ntle, 'me tharollo e fetoha peista.Tlas'a ho sisinyeha, 5-10 ℃ 5 ml ea tharollo ea sodium nitrite e ile ea rotha ka hare ho metsotso e 20, 'me ho tsosoa ho ile ha tsoela pele ka metsotso e ka bang 20.40% ea tharollo ea sodium ea acetate e ile ea sebelisoa ho fetola pampiri ea teko e khubelu ea Congo hore e se nke lehlakore ho fumana tharollo ea letsoai ea diazonium.

Qhala 0.7 g ya crystalline copper sulfate, 0.2 g ya sodium sulfite le 1.6 g ya sodium acetate hydrate ka 10% formaldehyde oxime tharollo, 'me tharollo e fetoha e tala.Kamora ho rotha, boloka mocheso o tlase bakeng sa metsotso e 30 ho fumana tharollo ea bohlooho, eketsa 30 ml concentrated hydrochloric acid, phahamisa mocheso ho 100 ℃, refluxe bakeng sa hora e le 'ngoe, tharollo e bonahala e le lamunu, distillation ea mouoane, fumana bosoeu bo bosehla hanyane, sefa le ho omisa ho fumana sehlahisoa sa p-benzaldehyde.Sehlahisoa se ile sa tsosolosoa ka motsoako oa motsoako oa 1: 1 joala le metsi.