Preparation of chlorinating reagent or chlorination reaction itself for use in a reaction such as production of high intensity sweetener trichlorogalactosucrose (TGS) from partially protected sucrose, comprising reaction of dimethylformamide (DMF) with thionyl chloride or another sulphur containing inorganic acid chlorides including sulphuryl chloride is faced with a problem of prolific release of gaseous by-products, that at times may lead to violent explosion also. This problem is solved by innovative addition of solid powder inert to the constituents of the chlorination reaction mixture to the reaction, or by adding DMF to acid chloride solution in that order. The invention also leads to use of isolated solid Vilsmeier reagent being used for chlorination in a solvent other than DMF making it possible to avoid altogether problems arising from use of DMF which include irrecoverable loss in alkaline as well as acid conditions, interference in crystallization of TGS and the like.
用于反应中的
氯化试剂的制备或
氯化反应本身,例如从部分保护的
蔗糖中生产高强度
甜味剂三
氯半
乳糖(TGS),包括二甲基甲酰胺(
DMF)与
氯化亚砜或其他含
硫无机酸氯化物(包括亚
硫酰氯)反应,面临着大量释放气态副产物的问题,有时甚至可能导致剧烈爆炸。这一问题通过创新地向
氯化反应混合物的成分中添加固体粉末惰性物质,或按顺序向酸
氯化物溶液中添加
DMF来解决。该发明还导致孤立固体维尔斯迈尔试剂用于在非
DMF溶剂中进行
氯化,从而避免完全使用
DMF所带来的问题,包括在碱性和酸性条件下不可恢复的损失,对TGS结晶的干扰等。