Synthesis, Biological Evaluation and Machine Learning Prediction Model for Fluorinated Cinchona Alkaloid-Based Derivatives as Cholinesterase Inhibitors
A series of 46 Cinchonaalkaloidderivatives that differ in positions of fluorine atom(s) in the molecule were synthesized and tested as human acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitors. All tested compounds reversibly inhibited AChE and BChE in the nanomolar to micromolar range; for AChE, the determined enzyme-inhibitor dissociation constants (Ki) ranged from 3.9–80 µM
In order to prepare asymmetrically (R)-(+)-1-(5-bromopentyl)-1-methyl-7-methoxy-2-tetralone (3a), a key intermediate of dezocine, 17 cinchona alkaloid-derived catalysts were prepared and screened for the enantioselective alkylation of 1-methyl-7-methoxy-2-tetralone with 1,5-dibromopentane, and the best catalyst (C7) was identified. In addition, optimizations of the alkylation were carried out so that
Enantioselective Phase-Transfer-Catalyzed Synthesis of Spirocyclic Azetidine Oxindoles
作者:Alexander J. Boddy、Aditya K. Sahay、Emma L. Rivers、Andrew J. P. White、Alan C. Spivey、James A. Bull
DOI:10.1021/acs.orglett.4c00358
日期:2024.3.15
Spiro-3,2′-azetidine oxindoles combine two independently important pharmacophores in an understudied spirocyclic motif that is attractive for medicinal chemistry. Here, the enantioselective synthesis of these structures is achieved in up to 2:98 er through intramolecular C–C bond formation, involving activation of the substrate with a novel SF5-containing chiral cation phase-transfer (PT) catalyst
Spiro-3,2'-azetidine oxindoles 将两个独立重要的药效团结合在一个正在研究的螺环基序中,这对药物化学很有吸引力。在这里,这些结构的对映选择性合成是通过分子内 C-C 键形成在高达 2:98 er 的时间内实现的,涉及用新型含 SF 5的手性阳离子相转移 (PT) 催化剂活化底物。该产品易于精制/脱保护,以提供医学相关的对映体富集化合物。对照实验表明界面 PT 机制,通过活化氯离子离去基团实现催化不对称诱导。