Synthesis yeAlkyl polyglycoside carbonates

Alkyl polyglycoside carbonates yakagadzirwa ne transesterification yealkyl monoglycosides ine diethyl carbonate (Mufananidzo 4).Muchido chekunyatsosanganiswa kwezvinoita, zvakaratidza kuve zvinobatsira kushandisa diethyl carbonate yakawandisa kuitira kuti ishande sese transesterification chikamu uye se solvent.2Mole-% ye 50% sodium hydroxide solution inowedzerwa dropwise kune iyi musanganiswa nekukurudzira kunenge 120 ℃.After 3hours pasi pe reflux, musanganiswa wekuita unobvumirwa kutonhora kusvika ku80 ℃ uye wakasvibiswa ne85% phosphoric acid.Iyo yakawandisa diethyl carbonate inobviswa mu vacuo.Pasi pemamiriro ezvinhu aya ekuita, rimwe boka rehydroxyl rinonyanya kusimbiswa.Reshiyo yeyasara educt kune zvigadzirwa mu1:2.5:1(monoglycoside:Monocarbonate:Polycarbonate).

Kunze kweiyo monocarbonate, zvigadzirwa zvine mwero wakanyanya wekutsiva zvinoumbwa mune iyi kuita.Iyo dhigirii yekabhoni yekuwedzera inogona kudzorwa nehunyanzvi manejimendi ekuita.Kune C₁₂ monoglycoside, kugoverwa kwemono-,di- uye tricarbonate ye7:3:1 inowanikwa pasi pemamiriro ekuita achangobva kutsanangurwa (Mufananidzo 5).Kana iyo nguva yekuita yakawedzera kusvika 7hours uye kana 2moles ye ethanol yakabviswa panguva iyoyo, chigadzirwa chikuru ndiC.₁₂ monoglycoside dicarbonate.Kana yakawedzera kusvika 10hours uye 3moles ye ethanol inobviswa, chigadzirwa chikuru chinozowanikwa ndeye tricarbonate.Iyo dhigirii yekabhoni yekuwedzera uye nekudaro iyo hydrophilic/lipophilic chiyero chealkyl polyglycoside compound inogona kugadziridzwa zviri nyore nekusiyana kwekuita nguva uye distillate vhoriyamu.