Selective synthesis of heterobifunctional poly(ethylene glycol) derivatives containing both mercapto and acetal terminals

被引:82
作者
Akiyama, Y
Otsuka, H
Nagasaki, Y
Kato, M
Kataoka, K
机构
[1] Sci Univ Tokyo, Dept Mat Sci & Technol, Noda, Chiba 2788510, Japan
[2] Univ Tokyo, Dept Mat Sci, Grad Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan
关键词
D O I
10.1021/bc000034w
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
A novel synthetic route to heterobifunctional poly(ethylene glycol) (PEG) derivatives containing both mercapto and acetal terminal groups was established in this study using anionic ring opening polymerization of ethylene oxide (EO) using potassium 3,3-diethoxypropanolate (PDP) as the initiator, followed by the successive conversion of the end-alkoxide group to a methanesulfonic group, and then to an ethyldithiocarbonate moiety. Molecular functionalities of the acetal and the mercapto terminal groups of the heterotelechelic PEG (acetal-PEG-SH) thus prepared were confirmed to 1.00 and 0.85, respectively, indicating that the reaction proceeds almost quantitatively. The obtained acetal-PEG-SH products, including 2-pyridyldithio derivatives, have a promising utility for bioconjugation in the fields of medicine and biology.
引用
收藏
页码:947 / 950
页数:4
相关论文
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