non-enzymatic kinetic resolution of primaryamines via enantioselective N-acylation with acyl chlorides was accomplished for the first time by using the selective sequestration of one enantiomer within a supramolecular cyclodextrin (CD) nanocapsule in nonpolar solvents. In addition, the first example of a crystalline structure for an inclusion complex between an acyl chloride and a CD derivative is reported
A Versatile and Practical Solvating Agent for Enantioselective Recognition and NMR Analysis of Protected Amines
作者:Daniel P. Iwaniuk、Christian Wolf
DOI:10.1021/jo101426a
日期:2010.10.1
The 3,5-dinitrobenzoyl-derived 1-naphthylethyl amide 3 is an attractive CSA for NMR analysis of protected amines. It is readily prepared in a single step and combines practical resolution of diastereomeric complexes due to signal sharpness and effective signal separation. Crystallographic analysis shows that 3 forms a chiral cleft that can selectively bind one enantiomer of a substrate through hydrogen bonding, pi-pi stacking, and CH/pi interactions. The enantioselective complex formation causes strong upfield shifts in the H-1 NMR spectrum even in the presence of only 5 mol % of 3.
Structure‐Activity Relationships of Benzamides and Isoindolines Designed as SARS‐CoV Protease Inhibitors Effective against SARS‐CoV‐2
Inhibition of coronavirus (CoV)‐encoded papain‐like cysteine proteases (PLpro) represents an attractive strategy to treat infections by these important human pathogens. Herein we report on structure‐activity relationships (SAR) of the noncovalent active‐site directed inhibitor (R)‐5‐amino‐2‐methyl‐N‐(1‐(naphthalen‐1‐yl)ethyl) benzamide (2 b), which is known to bind into the S3 and S4 pockets of the
抑制冠状病毒(CoV)编码的木瓜蛋白酶样半胱氨酸蛋白酶(PL pro )是治疗这些重要人类病原体感染的一种有吸引力的策略。在此,我们报告了非共价活性位点定向抑制剂 ( R )-5-氨基-2-甲基-N-(1-(萘-1-基)乙基)苯甲酰胺的构效关系 (SAR) ( 2 b ) ,已知它会结合到 SARS-CoV PL pro的 S3 和 S4 口袋中。此外,我们报告发现异吲哚啉是一类新的有效 PL前体抑制剂。这些研究还提供了对该抑制剂类的结合模式的更深入的了解。重要的是,这些抑制剂还被证实能够抑制细胞培养中的 SARS-CoV-2 复制,这表明,由于目标蛋白酶的结构高度相似,针对 SARS-CoV PL pro鉴定的抑制剂是开发新的泛型抑制剂的宝贵起点。 ‐冠状病毒抑制剂。