The present invention relates to compounds of Formula (I):
1
wherein A
1
is methylene, ethylene or propylene group and A
2
is N or CR
5
, or stereoisomeric forms, stereoisomeric mixtures, or pharmaceutically acceptable salt forms thereof, which are useful as inhibitors of HCV NS3 protease, and to pharmaceutical compositions and diagnostic kits comprising the same, and methods of using the same for treating viral infection or as an assay standard or reagent.
Exploring the Scope of an α/β-Aminomutase for the Amination of Cinnamate Epoxides to Arylserines and Arylisoserines
作者:Prakash K. Shee、Nishanka Dilini Ratnayake、Tyler Walter、Olivia Goethe、Edith Ndubuaku Onyeozili、Kevin D. Walker
DOI:10.1021/acscatal.9b01557
日期:2019.8.2
signals confirmed the diastereomeric ratios and relative stereochemistries. Application of a (2S)-threonine aldolase from E. coli further established the absolute stereochemistry of the chiral derivatives of the diastereomeric enzymatically derived products. The 2R:2S ratio for the biocatalyzed anti-isomers was highest (88:12) for 3′-NO2-phenylserine and lowest (66:34) for 4′-F-phenylserine. This showed
A short, mild and efficient synthetic route of α-amino acid via alkylation, Michael addition and carbonyl addition as well as cycloaddition of aldimines derived from glycine and alanine esters with benzaldehyde under solid-liquid phase transfer catalytic condition has been studied. The key to solid-liquid phase transfer catalyzed reactions is the selection of a base for the various reactants. The yield
研究了在固-液相转移催化条件下,通过烷基化,迈克尔加成和羰基加成以及甘氨酸和丙氨酸酯衍生的亚胺与苯甲醛环加成,合成短而温和高效的α-氨基酸的路线。固液相转移催化反应的关键是为各种反应物选择碱。产量取决于所用的碱。讨论了使用KOH,K 2 CO 3和Na 2 CO 3获得的结果。研究了固液PTC苄基化反应的动力学,我们提出了一种可能的固液PTC机理作为界面自动催化程序。介绍了一些α-氨基酸合成的细节。
Synthetic Studies of Amino Acids by the Use of Copper Complex. II. The Condensation Reaction of<i>N</i>-Pyruvylideneglycinatocopper(II) Complexes with various Aldehydes
mechanism of the reaction which involves the base-catalyzed condensation of bis(glycinato)copper(II) with aldehydes was carried out with the purpose of improving it so that it can proceed even with lower molar equivalent ratios of aldehydes to the complex and under milder conditions. On the basis of the results reported in the literature and those of this investigation, the reaction has been carried
对涉及双(甘氨酸)铜 (II) 与醛的碱催化缩合的反应机理进行了研究,目的是对其进行改进,使其即使在醛与醛的摩尔当量比较低的情况下也能进行。复杂且条件温和。根据文献报道的结果和本次调查的结果,该反应按预期进行,并新表明适用于对甲苯甲醛和对氯苯甲醛,而且适用于此类醛糖衍生物通过在反应中使用 N-pyruvylideneglycinatocopper (II) 配合物代替双 (glycinato) 铜 (II),作为 2,3-O-异亚丙基-D-甘油醛。本通信还将描述进一步改进的尝试。
Synthetic Studies of Amino Acids by the Use of Copper(II) Complexes. V. The Preparation of Hydroxy Amino Acids by a Set of Improved Procedures
A variety of hydroxy amino acids were prepared by a brief treatment of a resulting mixture, which was obtained by a base-catalyzedcondensation reaction of N-pyruvylideneglycinatoaquocopper(II) with aldehydes, on a column of Amberlite IR-120B (H form) resin.
在 Amberlite IR-120B(H 型)树脂柱上,通过 N-pyruvylideneglycinatoaquocopper (II) 与醛的碱催化缩合反应获得的混合物,通过简单处理制备了多种羟基氨基酸.