Enzyme-mediated enantioselective hydrolysis of soluble polymer-supported carboxylates
作者:Masayuki Okudomi、Kanpei Ageishi、Tomomi Yamada、Naoka Chihara、Takuya Nakagawa、Katsumi Mizuochi、Kazutsugu Matsumoto
DOI:10.1016/j.tet.2010.07.076
日期:2010.10
The enzyme-mediated enantioselective hydrolysis of water-soluble polymer-supported carboxylates is disclosed. The representative monomethoxy poly(ethylene glycol) (MPEG, av MW 5000)-supported substrate was synthesized by immobilization of (±)-1-phenylethanol onto the modified MPEG (MPEG/NH2) through an carboxylate linker with a succinate spacer. For the screening of the hydrolytic enzymes, the substrate
公开了酶介导的水溶性聚合物负载的羧酸盐的对映选择性水解。通过将(±)-1-苯基乙醇通过带有琥珀酸酯间隔基的羧酸酯连接基固定在改性的MPEG(MPEG / NH 2)上,合成了代表性的由单甲氧基聚(乙二醇)(MPEG,av MW 5000)支撑的底物。对于水解酶的筛选,将基板对映选择性脂肪酶水解从南极假丝酵母中的混合溶剂(诺维信435)(己烷/缓冲液= 9/1)在30℃下,得到剩余的(小号) -底物和生成的(R)-醇(E值> 200)。无需任何费力的柱色谱,即可通过简单的步骤轻松分离产物。用NaOH的MeOH / H 2 O溶液水解底物,得到相应的(S)-醇。我们还发现,在MPEG部分和羧酸酯连接基之间的间隔基结构强烈地影响了反应性和对映选择性,带有谷氨酸间隔基的底物给出了最好的结果。我们的程序适用于几种旋光性醇的制备。