申请人:Sumitomo Chemical Company, Limited
公开号:EP2014648A1
公开(公告)日:2009-01-14
A method of producing a proline derivative of the following formula (1) or an acid addition salt thereof, comprising the following four steps A to D:
[wherein, any two of R1, R2, R3, R4, R5 and R6 are connected to form an optionally substituted polymethylene group having 1 to 4 carbon atoms, and R7 represents an optionally substituted linear alkyl group having 1 to 10 carbon atoms, branched alkyl group having 2 to 10 carbon atoms, linear alkenyl group having 2 to 10 carbon atoms, branched alkenyl group having 3 to 10 carbon atoms or aralkyl group having 7 to 20 carbon atoms.]
(Step A)
A step of reacting N-protected pyrrolidinones of the following formula (2) with a reducing agent, to produce N-protected pyrrolidinols of the following formula (3):
(Step B)
A step of reacting the N-protected pyrrolidinols of the formula (3) obtained in the step A with a cyanodizing agent, to produce N-protected cyanopyrrolidines of the following formula (4):
(Step C)
A step of reacting the N-protected cyanopyrrolidines of the formula (4) obtained in the step B with alcohols and a base, to obtain imidates of the following formula (5), and treating the imidates with an acid, to produce N-protected prolines of the following formula (6):
(Step D)
A step of treating the N-protected prolines of the formula (6) obtained in the step C with an acid, to produce a proline derivative of the above-described formula (1) or an acid addition salt thereof.
一种生产下式(1)的脯氨酸衍生物或其酸加成盐的方法,包括以下四个步骤 A 至 D:
[其中,R1、R2、R3、R4、R5 和 R6 中的任意两个连接形成具有 1 至 4 个碳原子的任选取代的聚亚甲基,R7 代表具有 1 至 10 个碳原子的任选取代的直链烷基、具有 2 至 10 个碳原子的支链烷基、具有 2 至 10 个碳原子的直链烯基、具有 3 至 10 个碳原子的支链烯基或具有 7 至 20 个碳原子的芳烷基。]
(步骤 A)
将下式(2)的 N-保护吡咯烷酮与还原剂反应,生成下式(3)的 N-保护吡咯烷 醇:
(步骤 B)
将步骤 A 中得到的式 (3) 的 N-保护吡咯烷酮与氰化剂反应,生成下式 (4) 的 N-保护氰基吡咯烷:
(步骤 C)
将步骤 B 中得到的式 (4) 的 N-保护氰基吡咯烷与醇和碱反应,得到下式 (5) 的亚胺酸盐,并用酸处理亚胺酸盐,得到下式 (6) 的 N-保护脯氨酸:
(步骤 D)
用酸处理步骤 C 中得到的式 (6) 的 N-保护脯氨酸,生成上述式 (1) 的脯氨酸衍生物或其酸加成盐。