申请人:Xu Shaojun
公开号:US20090076261A1
公开(公告)日:2009-03-19
A process for preparing a sucrose-6-ester, a key intermediate to sucralose. The process contains (a) reacting sucrose with a di(hydrocarbyl)tin oxide or a 1,3-diacyloxy-1,1,3,3-tetra(hydrocarbyl)distannoxane in the presence of a secondary alcohol and an organic polar aprotic solvent, to prepare a mixture comprising 1,3-di-(6-O-sucrose)-1,1,3,3-tetra(hydrocarbyl)distannoxane and the secondary alcohol; and (b) adding an acylating agent to the mixture, thereby acylating the 1,3-di-(6-O-sucrose)-1,1,3,3-tetra(hydrocarbyl)distannoxane to prepare a sucrose-6-ester.
制备蔗糖-6-酯的过程,这是制备三氯蔗糖的关键中间体。该过程包括(a)将蔗糖与二(烃基)锡氧化物或1,3-二酰氧基-1,1,3,3-四(烃基)二锡氧烷在次级醇和有机极性非质子溶剂的存在下反应,以制备包含1,3-二-(6-O-蔗糖)-1,1,3,3-四(烃基)二锡氧烷和次级醇的混合物;以及(b)向混合物中加入酰化剂,从而酰化1,3-二-(6-O-蔗糖)-1,1,3,3-四(烃基)二锡氧烷,制备蔗糖-6-酯。