Synthesis and X-ray Studies of Chiral Allosteric Modifiers of Hemoglobin
摘要:
This study was designed to investigate the effect of chirality on the allosteric activity of a series of Hb allosteric modifiers. The chiral analogues were based on the lead compound (4), JP7, {1-[4-(((3,5-dimethylanilino)carbonyl)methyl)phenoxy]cyclopentanecarboxylic acid} with different D- and L-amino acids conjugated to the JP7 acid moiety. The D-isomers were the most potent in vitro effectors in Hb solutions as well as with whole blood. In general, this study demonstrated that the chirality of extended amino acid side chains in JP7 conjugates plays an important role in observed degree of allosteric activity. The binding site interactions for four analogues were determined by single crystallographic diffraction studies. Conclusions show that the chiral configuration of some of the D-isomers enable the effectors to bind with a greater number of interactions with the protein residues. D- and L-isomers with equivalent or near equivalent allosteric activity did not show any significant differences or interactions between their amino acid side chains and the protein. The most potent effectors, in vitro, were compounds 15 and 19, D-isomers of leucine and phenylalanine, respectively. Compounds 21, 22, 30, and 32 were more potent in vitro in Hb solutions than JP7.
Synthesis and X-ray Studies of Chiral Allosteric Modifiers of Hemoglobin
摘要:
This study was designed to investigate the effect of chirality on the allosteric activity of a series of Hb allosteric modifiers. The chiral analogues were based on the lead compound (4), JP7, {1-[4-(((3,5-dimethylanilino)carbonyl)methyl)phenoxy]cyclopentanecarboxylic acid} with different D- and L-amino acids conjugated to the JP7 acid moiety. The D-isomers were the most potent in vitro effectors in Hb solutions as well as with whole blood. In general, this study demonstrated that the chirality of extended amino acid side chains in JP7 conjugates plays an important role in observed degree of allosteric activity. The binding site interactions for four analogues were determined by single crystallographic diffraction studies. Conclusions show that the chiral configuration of some of the D-isomers enable the effectors to bind with a greater number of interactions with the protein residues. D- and L-isomers with equivalent or near equivalent allosteric activity did not show any significant differences or interactions between their amino acid side chains and the protein. The most potent effectors, in vitro, were compounds 15 and 19, D-isomers of leucine and phenylalanine, respectively. Compounds 21, 22, 30, and 32 were more potent in vitro in Hb solutions than JP7.
Construction of Vicinal Quaternary Carbons via Cu-catalyzed Dearomative Radical Addition
作者:Naoki Tsuchiya、Takashi Nishikata
DOI:10.1246/cl.190247
日期:2019.7.5
In this paper, we confirmed the dearomative addition of tertiary alkyl radicals onto BHT derivatives to form highly congested vicinal quaternary carbons to produce tert-alkylated styrenes in the pr...
CYCLOALKYL ACID DERIVATIVE, PREPARATION METHOD THEREOF, AND PHARMACEUTICAL APPLICATION THEREOF
申请人:SHANGHAI HENGRUI PHARMACEUTICAL CO., LTD.
公开号:US20160108035A1
公开(公告)日:2016-04-21
Cycloalkyl acid derivatives, a preparation method thereof, and a pharmaceutical application thereof are described. In particular, a cycloalkyl acid derivative represented by general formula (I) and a medical salt thereof, a preparation method thereof, and an application of the cycloalkyl acid derivative and the medical salt thereof as URAT1 inhibitors, and particularly as therapeutic agents for diseases related to an abnormal uric acid level are described, wherein definitions of substituent groups in general formula (I) are the same as the definitions in the specification.
본 발명은 사이클로알킬산 유도체, 그의 제조 방법 및 그의 약학적 용도에 관한 것이며, 특히 본 발명은 하기 화학식 I에 의해 나타내는 사이클로알킬산 유도체 및 그의 의학적 염, 그의 제조 방법, 및 URAT1 억제제로서 및 특히 이상 요산 수준과 관련된 질병에 대한 치료제로서 상기 사이클로알킬산 유도체 및 그의 의학적 염의 용도에 관한 것이며, 여기에서 화학식 I의 치환체 그룹들의 정의는 명세서에서의 정의와 같다. 화학식 I
Catalytic Cyclopropanol Ring Opening for Divergent Syntheses of γ-Butyrolactones and δ-Ketoesters Containing All-Carbon Quaternary Centers
作者:Zhishi Ye、Xinpei Cai、Jiawei Li、Mingji Dai
DOI:10.1021/acscatal.8b00711
日期:2018.7.6
cyclopropanol ring opening cross couplings with 2-bromo-2,2-dialkyl esters. Our mechanistic studies reveal that unlike the previously reported cases, the formation of α,β-unsaturated enone intermediates is actually essential for the γ-butyrolactone synthesis and also contributes to the formation of the δ-ketoester product. The γ-butyrolactone synthesis is proposed to go through an intermolecular radical conjugate