Ole mama maualuga Ethyl 4-bromobutyrate CAS Numera 2969-81-5 ma le tau sili ona lelei

I totonu o se fagu tali faʻapipiʻi faʻapipiʻiina i se mea faʻafefete, thermometer ma faʻafefe faʻafefe, 200 g (2.33 mol) o le γ -butyrolactone ma le 375mL o le anhydrous ethanol na faʻaopoopoina, faʻamalieina i le 0 ℃ i totonu o se taele masima aisa, ma faʻagogo kasa hydrogen bromide na faʻafeiloaʻi seia oʻo. na tumau pea le le suia o mea e tali atu ai, lea e tusa ma le 2 itula.Tuu i le 0℃ mo le 24h.Liligi le mea fa'afefe i totonu o le 1L vai malulu, fa'afefiloi atoa, tu'u'ese'ese le vaega fa'aola, ma aveese fa'alua le vai fa'atasi ma le bromoethane, 10mL i taimi ta'itasi.Faʻapipiʻiina o mea faʻapitoa, fufuluina o le ethanol ma le 2% potassium hydroxide solution, faʻamagoina le hydrochloric acid ma le vai, faʻamago ma le sodium sulfate anhydrous, toe faʻaleleia le solvent, vacuum fractionating, ma le aoina o vaega i le 97 ~ 99 ℃ / 3.3 kPa e maua ai le 350 ~ 380 g o le ethyl γ-bromobutyrate (1) faʻatasi ai ma se fua o le 77% ~ 84%.