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Enantioselective Hydrolysis of α-Amino Acid Ester by Chiral Metallomicelles
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作者 Jing Song YOU Xiao Qi YU Xiao Ling ZHANG and Ru Gang XIE(Department of Chemistry, Sichuan University, Chengdu 610064) 《Chinese Chemical Letters》 SCIE CAS CSCD 1998年第4期335-337,共3页
A series of chiral lipophilic Cu(Ⅱ) complexes were investigated as catalysts for the enantioselective hydrolysis of R(S)-p-nitrophenyl N-dodecanoyl-phenylalaninate in micelles. The highest enantioselectivity (kR/ks=7... A series of chiral lipophilic Cu(Ⅱ) complexes were investigated as catalysts for the enantioselective hydrolysis of R(S)-p-nitrophenyl N-dodecanoyl-phenylalaninate in micelles. The highest enantioselectivity (kR/ks=7. 81) was observed in a mixed micellar system composed of 1-Cu(Ⅱ) and Brij35. 展开更多
关键词 MICELLE chiral metallomicelle enantioselective hydrolysis
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A New Metallomicelle with Hydrolytic Metalloenzymatic Activity
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作者 Qiu Yun DAI Yun Du Deng(Beijing Institute of Pharmaceutical Chemistry, Beijing 102205) 《Chinese Chemical Letters》 SCIE CAS CSCD 1996年第10期879-880,共2页
A new metallomicelle, formed by Cu2+ Or Zn2+ ion and N-tetradecyl-2-(N-2-hydroxyethyl aminomethyl) imidazol in the presence of cetyltrimethylammonium bromide, was found to possess remarkable catalytic activity to the ... A new metallomicelle, formed by Cu2+ Or Zn2+ ion and N-tetradecyl-2-(N-2-hydroxyethyl aminomethyl) imidazol in the presence of cetyltrimethylammonium bromide, was found to possess remarkable catalytic activity to the hydrolysis of p-nitrophenyl picolinate. 展开更多
关键词 A New Metallomicelle with Hydrolytic Metalloenzymatic Activity
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Catalytic Hydrolysis of Lipophilic Amino Acid Esters by Metallomicelles as Carboxypeptidase A Models
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作者 Xiao Qi YU Jing Song YOU +2 位作者 Qing Xiang XIANG Qian Shun YAN Ru Gang XIE (Department of Chemistry, Sichuan University, Chengdu 610064) 《Chinese Chemical Letters》 SCIE CAS CSCD 1998年第8期731-732,共2页
Lipophilic complexes of macrocyclic 12-membered dioxotetraamine ligand bearing bis-hydroxy groups as functional pendants are effective catalysts for the hydrolysis of amino acid esters in micellar media, and the rate ... Lipophilic complexes of macrocyclic 12-membered dioxotetraamine ligand bearing bis-hydroxy groups as functional pendants are effective catalysts for the hydrolysis of amino acid esters in micellar media, and the rate enhancement of more than 10-fold were observed. 展开更多
关键词 metallomicelles lipophilic complexes amino acid esters HYDROLYSIS
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Accelerated Hydrolysis of p-Nitrophenyl Picolinate Catalyzed by Metallomicelle Made from a Novel Macrocyclic Polyamine Copper(Ⅱ) Complex
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作者 寇兴明 赵国坡 +3 位作者 黄忠 田玉华 孟祥光 曾宪诚 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2007年第6期772-777,共6页
A copper(Ⅱ) complex 1 of a novel macrocyclic polyamine ligand with hydroxylethyl pendant groups, 4,11-bis(hydroxylethyl)-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane (L) has been synthesized and ... A copper(Ⅱ) complex 1 of a novel macrocyclic polyamine ligand with hydroxylethyl pendant groups, 4,11-bis(hydroxylethyl)-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane (L) has been synthesized and characterized. Rate enhancement for hydrolysis of p-nitrophenyl picolinate (PNPP) catalyzed by 1 was studied kinetically under Brij35 micellar condition. For comparision, the catalytic activity of corresponding copper(Ⅱ) complex 2 of non-substituted macrocyclic polyamine ligand, 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraaza-cyclotetradecane (L') toward the hydrolysis of PNPP was also investigated. The results indicate that the macrocyclic polyamine copper(Ⅱ) complex 1 effectively catalyzed the hydrolysis of PNPP, and the pendant ligand hydroxyl group or deprotonated pendant ligand hydroxyl group can act as catalytically active species in the reaction. A ternary Complex kinetic model involving metal ion, ligand and substrate has been proposed, and the results confirmed the reasonability of such kinetic model. 展开更多
关键词 macrocyclic polyamine copper(Ⅱ) complex carboxylic ester METALLOMICELLE HYDROLYSIS
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