Structure−Activity Relationships of a Novel Class of Endothelin-A Receptor Antagonists and Discovery of Potent and Selective Receptor Antagonist, 2-(Benzo[1,3]dioxol-5-yl)-6-isopropyloxy-4-(4-methoxyphenyl)-2H-chromene-3- carboxylic Acid (S-1255). 1. Study on Structure−Activity Relationships and Basic Structure Crucial for ETA Antagonism
摘要:
A novel series of endothelin-A (ETA) selective receptor antagonists having a 2H-chromene skeleton are described. A lead compound, 2-(benzo[1,3]dioxol-5-yl)-2H-chromene-3-carboxylic acid (3), was found by modifications of our own angiotensin II antagonist. A structure-activity relationship (SAR) study of 3 reveals that the structural requirements essential for potent and selective ETA receptor binding affinity are the m,p-methylenedioxyphenyl, carboxyl, and isopropoxy groups at the 2-, 3-, and 6-positions, respectively, on the (R)-2H-chromene skeleton. The substituent at the 4-position is also important for improving the activity, and various hydrophobic functional groups of 6-9 Angstrom such as liner, branched, and cyclic aliphatic groups, unsubstituted and substituted aryl groups, and even halogen atoms were acceptable. These results suggest that (R)-2-(benzo[1,3]dioxol-5-yl)-6-isopropoxy-2H-chromene-3-carboxylic acid, formula 108, is the crucial basic structure to be recognized by the ETA receptor. The most potent compound is (R)-48 (S-1255), which binds to the ETA receptor with an IC50 value of 0.19 nM and is 630-fold selective for the ETA receptor than for the ETB receptor. This compound has 55% oral bioavailability in rats. On the basis of the SAR, the roles of each substituent in the receptor binding are discussed.
A Facile and General Approach to 3-((Trifluoromethyl)thio)-4<i>H</i>-chromen-4-one
作者:Haoyue Xiang、Chunhao Yang
DOI:10.1021/ol502751k
日期:2014.11.7
A facile and efficient synthetic strategy to 3-((trifluoromethyl)thio)-4H-chromen-4-one was developed. AgSCF3 and trichloroisocyanuric acid were employed here to generate active electrophilic trifluoromethylthio species in situ. This reaction could proceed under mild conditions in a short reaction time and be insensitive to air and moisture.
开发了一种简便有效的合成3-((三氟甲基)硫代)-4 H -chromen-4-one的策略。这里使用AgSCF 3和三氯异氰尿酸原位产生活性的亲电子三氟甲硫基物质。该反应可在温和的条件下在短的反应时间内进行,并且对空气和湿气不敏感。
[EN] SUBSTITUTED CYCLOLAKYLS AS MODULATORS OF THE INTEGRATED STRESS PATHWAY<br/>[FR] CYCLOLALKYLES SUBSTITUÉS EN TANT QUE MODULATEURS DE LA VOIE DE STRESS INTÉGRÉE
申请人:CALICO LIFE SCIENCES LLC
公开号:WO2020223536A1
公开(公告)日:2020-11-05
Provided herein are compounds, compositions, and methods useful for modulating the integrated stress response (ISR) and for treating related diseases, disorders and conditions.
本文提供了用于调节综合应激反应(ISR)并治疗相关疾病、疾病和症状的化合物、组合物和方法。
Synthesis of Multisubstituted 2-Aminopyrroles/pyridines via Chemoselective Michael Addition/Intramolecular Cyclization Reaction
作者:Xueyu Qi、Haoyue Xiang、Qian He、Chunhao Yang
DOI:10.1021/ol5018855
日期:2014.8.15
A facile and efficient synthetic strategy to construct polysubstituted 2-aminopyrroles/pyridines was developed via chemoselective Michaeladdition/intramolecular cyclization reaction under very mild conditions. It suggested that the chemoselectivity of the process could be controlled by the leaving ability of the halides.
Substituent-Oriented Synthesis of Substituted Pyrazoles/Chromeno[3,2-<i>c</i>]pyrazoles via Sequential Reactions of Chromones/3-Chlorochromones and Tosylhydrazones
作者:Tianzi Dai、Qunyi Li、Xiaofei Zhang、Chunhao Yang
DOI:10.1021/acs.joc.9b00282
日期:2019.5.3
A facile and efficient synthetic strategy for the chemoselective synthesis of monocyclic/tricyclic-fused pyrazoles was developed, and it was oriented by different 3-position substituents (H or Cl) on the chromones. The reaction proceeded in a one-pot sequential way with a broad substrate scope and moderate to excellent yields.