1,4-Phthalaldehyde

Ku dar 6.0 g oo ah sodium sulfide, 2.7 g oo budada sulfur ah, 5 g oo sodium hydroxide ah iyo 60 ml oo biyo ah 250 ml saddex galaas luqun ah oo leh kondenser reflux iyo qalab wax walaaqaya, oo kor u qaad heerkulka ilaa 80 ℃ hoos walaaqda.Budada baaruudda jaalaha ah way milantaa, xalkuna casaan buu noqdaa.Dib-u-soo-celinta ka dib 1 saac, xal sodium polysulfide oo casaan ah ayaa la helayaa.

Ku dar 13.7 g oo ah p-nitrotoluene, 80 ml ethanol warshadaha, 0.279 g N, N-dimethylformamide iyo 2.0 g oo HOL ah 250 ml saddex galaas luquneed oo leh maro soo daadanaya, kondenser reflux iyo qalab wax kicinaya, kulayl iyo walaaq. si loo milo p-nitrotoluene si loo helo xal huruud ah oo khafiif ah.Marka heerkulku si tartiib tartiib ah kor ugu kaco ilaa 80 ℃ oo si joogto ah loo dhigo, xalka sodium polysulfide ee lagu diyaariyey tallaabada sare waa la tuurayaa, xalkuna wuxuu si dhakhso ah isu beddelaa buluug, ka dibna wuxuu isu beddelaa cagaar madow una beddelo bunni madow, ugu dambeyntiina wuxuu isu beddelaa midab casaan ah.Waxaa lagu soo riday 1.5-2.0 saacadood gudahood, ka dibna lagu hayaa 80 ℃ falcelinta refluxing muddo 2 saacadood ah.Distillation uumiga si degdeg ah ayaa loo fuliyaa.Isla mar ahaantaana nadiifinta, 100 ml oo biyo ah ayaa lagu daraa, 150 ml oo distillate ah ayaa la ururiyaa, qiimaha pH waa 7. Dareeraha haraaga ah waxaa lagu qaboojiyaa baraf si deg deg ah si uu u soo saaro crystals jaalaha fudud, kuwaas oo laga soo saaro ether (30 ml × 5). ), uumi baxay oo la engejiyey si loo helo p-aminobenzaldehyde oo adag.

Ku dar 5.89 paraformaldehyde, 13.2 g hydroxylamine hydrochloride iyo 85 ml oo biyo ah 250 ml saddex galaas qoorta leh, kuleyl oo walaaq si ay dhamaantood u milaan si ay u helaan xal aan midab lahayn, ka dibna ku dar 25.5 g sodium acetate hydrate, heerkulka ku hay 80 ℃ iyo dib u soo noqoshada 15 daqiiqo si aad u hesho formaldehyde oxime (10%) xal aan midab lahayn.

Ku dar 50 ml oo bir ah, ku dar 3.5 g p-aminobenzaldehyde, 10 ml oo biyo ah, ku shub 5 ml hydrochloric acid, oo sii walaaq.Walaxda jaalaha khafiifka ah ayaa si degdeg ah u madaw oo si joogto ah u milmaan.Si habboon ayaa loo kululayn karaa (ka hooseeya 6 ℃) si loo milo dhammaan.Ku qabooji qubeyska milixda barafka, heerkulku wuxuu hoos ugu dhacaa 5 ℃.Waqtigan xaadirka ah, p-aminobenzaldehyde hydrochloride waxay u soo baxdaa sida qaybo yaryar, xalkuna wuxuu noqdaa koollo.Marka la walaaqayo, 5-10 ℃ 5 ml oo ah nitrite sodium ayaa lagu daadiyay 20 daqiiqo gudahood, walaaquna waa la sii waday ilaa 20 daqiiqo.40% xal sodium acetate ayaa loo isticmaalay in lagu hagaajiyo warqadda tijaabada cas ee Congo si ay u noqoto mid dhexdhexaad ah si loo helo xalalka cusbada diazonium.

Kala dir 0.7 g oo ah crystalline copper sulfate, 0.2 g of sodium sulfite iyo 1.6 g of sodium acetate hydrate galay 10% formaldehyde oxime xal, xalkuna wuxuu noqdaa cagaar.Daadi ka dib, heerkulka hoose ku hay 30 daqiiqo si aad u hesho xal cawl, ku dar 30 ml hydrochloric acid xoog leh, kor u heerkulka ilaa 100 ℃, refluxe 1 saac, xalku u muuqataa orange, Distillation uumi, hel caddaan xoogaa huruud ah adag. shaandhee oo qallaji si aad u hesho alaabta ceeriin ee p-benzaldehyde.Alaabta ayaa dib loo kristallay iyadoo lagu daray dareeraha isku dhafan ee 1:1 aalkolada iyo biyaha.