Kūwaena
-
1,4-Phthalaldehyde
E hoʻohui i 6.0 g o ka sodium sulfide, 2.7 g o ka pauka sulfur, 5 g o ka sodium hydroxide a me 60 ml o ka wai i loko o ka 250 ml ʻekolu pahu ʻāʻī me ka reflux condenser a me ka mea hoʻoulu, a hoʻonui i ka mahana i 80℃malalo o ka hooulu ana.Hoʻoheheʻe ʻia ka pauda sulfur melemele, a ʻulaʻula ka hopena.Ma hope o ka refluxing no 1 h, loaʻa ka ʻulaʻula ʻulaʻula sodium polysulfide solution.
