Process for producing 2-amino-2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-1,3-propanediol hydrochloride and hydrates thereof, and intermediates in the production thereof
申请人:Kyorin Pharmaceutical Co., Ltd.
公开号:US07795472B2
公开(公告)日:2010-09-14
A process for the industrial production of 2-amino-2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-1,3-propanediol hydrochloride (Compound I), an effective immunosuppressant.
The process for producing 2-amino-2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-1,3-propanediol hydrochloride or a hydrate thereof includes the steps of reacting 4-(3-benzyloxyphenylthio)-2-chlorobenzaldehyde with ethyl diethylphosphonoacetate in a solvent in the presence of a base to form ethyl 3-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]acrylate; reducing the resulting ethyl 3-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]acrylate, followed by mesylation, iodination and nitration, to form 1-benzyloxy-3-[3-chloro-4-(3-nitropropyl)phenylthio]benzene; forming 2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-2-nitro-1,3-propanediol using a formaldehyde solution; and reducing the resulting 2-[2-[4-(3-benzyloxyphenylthio)-2-chlorophenyl]ethyl]-2-nitro-1,3-propanediol to form the desired product.
一种用于工业生产2-氨基-2-[2-[4-(3-苄氧基苯硫基)-2-氯苯基]乙基]-1,3-丙二醇盐酸盐(化合物I)的有效免疫抑制剂的工艺。制备2-氨基-2-[2-[4-(3-苄氧基苯硫基)-2-氯苯基]乙基]-1,3-丙二醇盐酸盐或其水合物的工艺包括以下步骤:在碱的存在下,将4-(3-苄氧基苯硫基)-2-氯苯甲醛与乙基二乙基膦酸酯在溶剂中反应,形成乙基3-[4-(3-苄氧基苯硫基)-2-氯苯基]丙烯酸酯;还原所得的乙基3-[4-(3-苄氧基苯硫基)-2-氯苯基]丙烯酸酯,随后进行甲磺化、碘化和硝化,形成1-苄氧基-3-[3-氯-4-(3-硝基丙基)苯硫基]苯;使用甲醛溶液形成2-[2-[4-(3-苄氧基苯硫基)-2-氯苯基]乙基]-2-硝基-1,3-丙二醇;并还原所得的2-[2-[4-(3-苄氧基苯硫基)-2-氯苯基]乙基]-2-硝基-1,3-丙二醇以形成所需的产物。