申请人:THE UPJOHN COMPANY
公开号:EP0127417A1
公开(公告)日:1984-12-05
A process for preparing a 1-aminomethyl-6- substituted -4H-s-triazolo [4,3-a] [1,4] benzodiazepine, e.g. adinazolam, directly from the corresponding 1-hydrogen -6- substituted -4H-s-triazolo [4,3-a] [1,4] benzodiazepine, e.g. from estazolam, comprises reacting the estazolam-type compound and a dimethylaminomethylene salt in a solvent in the presence of an alkali metal carbonate. The product is advantageously extracted from an aqueous organic solvent mixture thereof into a halogenated C1-3 alkane solvent while maintaining the pH of the aqueous phase between 3.0 and 4.0, and then recovered.
一种制备 1-氨基甲基-6-取代-4H-s-三唑并[4,3-a] [1,4] 苯并二氮杂卓,例如阿地那唑仑的工艺,是直接从相应的 1-氢-6-取代-4H-s-三唑并[4,3-a] [1,4] 苯并二氮杂卓,例如从艾司唑仑制备的。例如从艾司唑仑中提取,包括在碱金属碳酸盐存在下,在溶剂中使艾司唑仑型化合物和二甲氨基亚甲基盐反应。在保持水相 pH 值在 3.0 至 4.0 之间的情况下,将产物从水性有机溶剂混合物中萃取到卤代 C1-3 烷烃溶剂中,然后进行回收。