Synthetic receptors for uronic acid salts based on bicyclic guanidinium and deoxycholic acid subunits
摘要:
Four receptors for uronic acid salts have been prepared using a chiral bicyclic guanidinium unit and deoxycholic acid derivatives as building blocks. Binding constants in CD3CN/CDCl3 ranged from 3200 to 7000 M-1 for glucuronate and galacturonate salts. Nordeoxycholic-containing receptors were found more efficient and moderately selective for glucuronic salts. (C) 1997 Elsevier Science Ltd.
Imprinted Polymers as Protecting Groups for Regioselective Modification of Polyfunctional Substrates
作者:Cameron Alexander、Craig R. Smith、Michael J. Whitcombe、Evgeny N. Vulfson
DOI:10.1021/ja982238h
日期:1999.7.1
selective solvent extractions, and chemical modification experiments. The feasibility of using imprinted polymers as reusable protecting groups was established by the regioselective acylation of trihydroxysteroids bound to polymers imprinted with structurally related diols. In polymers prepared with tert-butyl ester templates “matched” to the substrate, regioselectivities as high as 23.1:1 (24-acetate:3-acetate)
Synthetic receptors for uronic acid salts based on bicyclic guanidinium and deoxycholic acid subunits
作者:Margot Segura、Victoria Alcázar、Pilar Prados、Javier de Mendoza
DOI:10.1016/s0040-4020(97)00834-x
日期:1997.9
Four receptors for uronic acid salts have been prepared using a chiral bicyclic guanidinium unit and deoxycholic acid derivatives as building blocks. Binding constants in CD3CN/CDCl3 ranged from 3200 to 7000 M-1 for glucuronate and galacturonate salts. Nordeoxycholic-containing receptors were found more efficient and moderately selective for glucuronic salts. (C) 1997 Elsevier Science Ltd.