A rapid, safe, and efficient method for the synthesis of novel molecular clefts based on deoxycholic acid was reported. Seven new molecular clefts have been synthesized in good yields （89-98%）. This method proved to...A rapid, safe, and efficient method for the synthesis of novel molecular clefts based on deoxycholic acid was reported. Seven new molecular clefts have been synthesized in good yields （89-98%）. This method proved to be extremely simple and highly efficient. The structures of these receptors were confirmed by 1H NMR, IR, MS spectra and elemental analysis. 2007 Zhi Gang Zhao. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.展开更多
A novel type of chiral molecular clefts consisting of a rigid deoxycholic acid methyl ester backbone and chiral unsymmetrically disubstituted urea side chain have been designed and synthesized. All these new receptor...A novel type of chiral molecular clefts consisting of a rigid deoxycholic acid methyl ester backbone and chiral unsymmetrically disubstituted urea side chain have been designed and synthesized. All these new receptors 3a^c and the corresponding key intermediates 1a^c and 2a^c are new compounds, their structures were confirmed by 1HNMR, IR, MS spectra and elemental analysis. These molecular clefts showed binding ability for halide anions.展开更多
A novel type of chiral molecular clefts was designed and synthesized by using chenodeoxycholic acid as spacer and aromatic compounds as arm.Their structures were confirmed by 1H NMR,IR,MS spectra and elemental analysi...A novel type of chiral molecular clefts was designed and synthesized by using chenodeoxycholic acid as spacer and aromatic compounds as arm.Their structures were confirmed by 1H NMR,IR,MS spectra and elemental analysis.Enantioselective recognition properties of these molecular clefts for amino acid methyl esters were investigated by UV-vis spectra titration. The results indicated that these molecular clefts not only recognize all amino acid methyl esters examined but also possess higher selectivity for L-amino acid methyl esters than for D-amino acid methyl esters.展开更多
A series of new molecular clefts are synthesized in good yields by using lithocholic acid as spacer to bridge different aromatic amines via triphosgene under microwave irradiation.Their structures are characterized by...A series of new molecular clefts are synthesized in good yields by using lithocholic acid as spacer to bridge different aromatic amines via triphosgene under microwave irradiation.Their structures are characterized by 1H NMR,IR,MS spectra and elemental analysis.Compared with the conventional method,this method is simple,safe,rapid,efficient and eco-friendly.展开更多
文摘A rapid, safe, and efficient method for the synthesis of novel molecular clefts based on deoxycholic acid was reported. Seven new molecular clefts have been synthesized in good yields （89-98%）. This method proved to be extremely simple and highly efficient. The structures of these receptors were confirmed by 1H NMR, IR, MS spectra and elemental analysis. 2007 Zhi Gang Zhao. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
基金the National Natural Science Foundation of China for the financial support(Project No.:20072026).
文摘A novel type of chiral molecular clefts consisting of a rigid deoxycholic acid methyl ester backbone and chiral unsymmetrically disubstituted urea side chain have been designed and synthesized. All these new receptors 3a^c and the corresponding key intermediates 1a^c and 2a^c are new compounds, their structures were confirmed by 1HNMR, IR, MS spectra and elemental analysis. These molecular clefts showed binding ability for halide anions.
文摘A novel type of chiral molecular clefts was designed and synthesized by using chenodeoxycholic acid as spacer and aromatic compounds as arm.Their structures were confirmed by 1H NMR,IR,MS spectra and elemental analysis.Enantioselective recognition properties of these molecular clefts for amino acid methyl esters were investigated by UV-vis spectra titration. The results indicated that these molecular clefts not only recognize all amino acid methyl esters examined but also possess higher selectivity for L-amino acid methyl esters than for D-amino acid methyl esters.
文摘A series of new molecular clefts are synthesized in good yields by using lithocholic acid as spacer to bridge different aromatic amines via triphosgene under microwave irradiation.Their structures are characterized by 1H NMR,IR,MS spectra and elemental analysis.Compared with the conventional method,this method is simple,safe,rapid,efficient and eco-friendly.
