从天然L-氨基酸开始,分三步方便地合成了一系列新的手性含氟β-羟基磺酰胺,并评估了它们的抗炎和镇痛活性。这些化合物的结构由FT-IR,1 H,13 C和19 F NMR,元素分析和HRMS证实。在测试的化合物中,4c,4g和4h表现出有希望的抗炎活性。而且,化合物4h显示出明显的镇痛活性。讨论了所选化合物的构效关系。
In Situ Deprotection and Incorporation of Unnatural Amino Acids during Cell-Free Protein Synthesis
作者:Isaac N. Arthur、James E. Hennessy、Dharshana Padmakshan、Dannon J. Stigers、Stéphanie Lesturgez、Samuel A. Fraser、Mantas Liutkus、Gottfried Otting、John G. Oakeshott、Christopher J. Easton
DOI:10.1002/chem.201203923
日期:2013.5.17
(DE3) used for cell‐free proteinsynthesis removes a wide range of α‐aminoacid protecting groups by cleaving α‐carboxyl hydrazides; methyl, benzyl, tert‐butyl, and adamantyl esters; tert‐butyl and adamantyl carboxamides; α‐amino form‐, acet‐, trifluoroacet‐, and benzamides; and side‐chain hydrazides and esters. The free aminoacids are produced and incorporated into a protein under standard conditions
New assignments for circular dichroism bands of carboxylic acid derivatives
作者:T. Połoński
DOI:10.1016/0040-4020(75)80044-5
日期:——
The CD of some carboxylic acid esters has been investigated in various solvents. Two bands were found in the 200–250 nm range for all esters and also for lactone 9. The band at 230 nm depends on the nucleophilicity of the heteroatom attached to the asymmetric centre, and vanishes in acidic media. On the basis of these observations and of the solvent effect, the 230 nm band has been assigned to the