The title compounds were prepared by the enzymatic resolution of the corresponding N-acetylated DL-amino acids methyl esters, which were obtained from t-butyl chloride via an 8-step synthesis.
Various addition-elimination approaches have been explored for diastereoselective construction of 1-amino- 1-cyclopropane-carboxylic acid (ACPC) derivatives, and the desired product was obtained from a reaction of cyc...Various addition-elimination approaches have been explored for diastereoselective construction of 1-amino- 1-cyclopropane-carboxylic acid (ACPC) derivatives, and the desired product was obtained from a reaction of cyclo(NAc-L-Val-NAc-Gly) and methyl α-bro-moacrylate under protonic solvent.展开更多
The solubility properties of ZnSO4-Met/Phe/His-H2O systems at 25℃ in thewhole concentration range have been investigated by phase equilibrium method, and the corresponding equilibrium diagrams have been constructed. ...The solubility properties of ZnSO4-Met/Phe/His-H2O systems at 25℃ in thewhole concentration range have been investigated by phase equilibrium method, and the corresponding equilibrium diagrams have been constructed. Under the direction of the phase equilibrium result, the compounds of ZnSO4 with Met, Phe and His which are not reported in literatures have been prepared and characterized.展开更多
The solubility properties of the zinc chloride- amino acids（Leu/Try/Val/Thr）- water systems at 25℃ in the whole concentration range have been investigated by equilibrium method, the corresponding phase diagrams and...The solubility properties of the zinc chloride- amino acids（Leu/Try/Val/Thr）- water systems at 25℃ in the whole concentration range have been investigated by equilibrium method, the corresponding phase diagrams and refractive index curves were constructed. The results indicate the formation of the congruently soluble compound of Zn（Leu）Cl2（ A） in Leu system and the incongruently soluble compounds of Zn（Try）Cl2· 1/2H2O（B）、 Zn（Val）Cl2· H2O（C）、 Zn（Val）2Cl2（D）、 Zn（Thr）Cl2· H2O（E） and Zn（Thr）2Cl2（F） in Try/Val/Thr systems, which have not been reported in literature. According to the phase equilibrium result, six solid complexes have been prepared in water, and their compositions have been determined by chemical analysis which are consistent with the results of phase diagrams.展开更多
基金This work was supported by the Natural Science Foundation of Jiangsu Province.
文摘The title compounds were prepared by the enzymatic resolution of the corresponding N-acetylated DL-amino acids methyl esters, which were obtained from t-butyl chloride via an 8-step synthesis.
文摘Various addition-elimination approaches have been explored for diastereoselective construction of 1-amino- 1-cyclopropane-carboxylic acid (ACPC) derivatives, and the desired product was obtained from a reaction of cyclo(NAc-L-Val-NAc-Gly) and methyl α-bro-moacrylate under protonic solvent.
文摘The solubility properties of ZnSO4-Met/Phe/His-H2O systems at 25℃ in thewhole concentration range have been investigated by phase equilibrium method, and the corresponding equilibrium diagrams have been constructed. Under the direction of the phase equilibrium result, the compounds of ZnSO4 with Met, Phe and His which are not reported in literatures have been prepared and characterized.
文摘The solubility properties of the zinc chloride- amino acids（Leu/Try/Val/Thr）- water systems at 25℃ in the whole concentration range have been investigated by equilibrium method, the corresponding phase diagrams and refractive index curves were constructed. The results indicate the formation of the congruently soluble compound of Zn（Leu）Cl2（ A） in Leu system and the incongruently soluble compounds of Zn（Try）Cl2· 1/2H2O（B）、 Zn（Val）Cl2· H2O（C）、 Zn（Val）2Cl2（D）、 Zn（Thr）Cl2· H2O（E） and Zn（Thr）2Cl2（F） in Try/Val/Thr systems, which have not been reported in literature. According to the phase equilibrium result, six solid complexes have been prepared in water, and their compositions have been determined by chemical analysis which are consistent with the results of phase diagrams.
