申请人:Polytherics Limited
公开号:EP2277550A1
公开(公告)日:2011-01-26
A process for the preparation of a compound of the general formula:
in which one of X and X' represents polyethylene glycol, and the other represents a hydrogen atom;
each Q independently represents a linking group;
W represents a keto group CO, an ester group -O-CO- or a sulphone group -SO2-, or a group obtained by reduction of such a group; or, if X' represents polyethylene glycol, X-Q-W-together represent a cyano group;
Z represents a protein which is linked to A and B via two thiol groups which have been derived from a disulphide bridge in the protein; A is a C1-5 alkylene or alkenylene chain; and
B is a bond or a C1-4 alkylene or alkenylene chain; which comprises reducing a disulfide bridge in a protein, and reacting the resultant product in an aqueous reaction medium with either (i) a compound of the general formula
in which X, X', Q, A, B and L have the meanings given above, W' represents a keto or aldehyde group CO, an ester group
-O-CO- or a sulphone group -SO2-, and each L independently represents a leaving group;
or (ii) a compound of the general formula
in which X, X', Q, W', A and L have the meanings given for the general formula II, and m represents an integer 1 to 4.
Also claimed is novel intermediate α-methoxy-ω-4-[2,2-bis[(p-tolylsulfonyl)methyl]-acetyl]benzamide poly(ethylene glycol).
一种通式化合物的制备方法:
其中 X 和 X'之一代表聚乙二醇,另一个代表氢原子;
每个 Q 独立地代表一个连接基团;
W 代表酮基 CO、酯基 -O-CO- 或砜基 -SO2- 或通过还原此类基团得到的基团;或者,如果 X' 代表聚乙二醇,则 X-Q-W 合在一起代表氰基;
Z 代表一种蛋白质,它通过两个硫醇基团与 A 和 B 相连,这两个硫醇基团来自蛋白质中的二硫键; A 是 C1-5 亚烷基或烯基链;以及
B 是键或 C1-4 亚烷基或烯基链; 其中包括还原蛋白质中的二硫桥,并使生成物在水性反应介质中与 (i) 通式如下的化合物反应
其中 X、X'、Q、A、B 和 L 具有上述含义,W'代表酮基或醛基 CO、酯基
-O-CO-或砜基团 -SO2-,每个 L 独立地代表一个离去基团;
或 (ii) 通式如下的化合物
其中 X、X'、Q、W'、A 和 L 具有通式 II 所给出的含义,m 代表 1 至 4 的整数。
还要求得到新型中间体α-甲氧基-ω-4-[2,2-双[(对甲苯磺酰基)甲基]-乙酰基]苯甲酰胺聚乙二醇。