1995年
MOLECULAR DESIGN OF TRANSITION-STATE ANALOG-IMPRINTED POLYMER CATALYSTS-STEREOSELECTIVE ESTEROLYSIS OF AMINO-ACID ESTERS
KOBUNSHI RONBUNSHU
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- 巻
- 52
- 号
- 10
- 開始ページ
- 644
- 終了ページ
- 649
- 記述言語
- 日本語
- 掲載種別
- 出版者・発行元
- SOC POLYMER SCIENCE JAPAN
Molecular design of polymer catalysts for the esterolysis of a marked amino acid ester substrate Z-L-Leu-PNP (PNP=p-nitrophenol) was performed. Either a transition-state analogue of Z-Leu-PP (phenyl 1-benzyloxycarbonly-3-methylpentylphosphonate) or a ground-state analogue of Z-L-Leu-AA (ethyl N-benzyloxycarbonyl-L-leucine-anthranilate) was used as a template molecule. In the esterolyses of amino acid esters in 10 vol% dimethyl sulfoxide (DMSO)-Tris buffer (pH 7.15) at 293 similar to 308 K, several water-soluble or insoluble polymer catalysts containing a L-histidine catalytic site, which were synthesized by the radical polymerization with acrylamide derivatives, incorporated the marked substrate into their reaction cavities effectively. An ammonium-chain containing water-soluble polymer catalyst exhibited a remarkable acceleration of the present reaction. The free energy of activation (23.9 kcal/mol at 303 K) of the uncatalyzed reaction decreased 7.0 kcal/mol.
- リンク情報
- ID情報
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- ISSN : 0386-2186
- Web of Science ID : WOS:A1995TC03100009