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.
Synthetic Utility and Mechanistic Implications of the Fries Rearrangement of Hydroquinone Diesters in Boron Trifluoride Complexes
作者:Jessica L. Boyer、Jodie E. Krum、Michael C. Myers、Aleem N. Fazal、Carl T. Wigal
DOI:10.1021/jo000412q
日期:2000.7.1
trifluoride etherate complexes results in acetylhydroquinone derivatives. This procedure represents a one-step synthesis of acetylhydroquinone derivatives, important building blocks for a variety of synthetic applications.
Dirchromone is a bioactive vinyl sulfoxide-bearing chromone first isolated from the shrub Dirca palustris. Altogether, 32 of its derivatives were prepared to assess the effect of substitution of its chromone core upon activities against cancer cell lines, Gram-positive bacteria, and fungi (such as Candida albicans). All compounds were synthesized following a synthetic strategy involving Pummerer and
2-Acylamino-4-phenylthiazole derivatives, preparation thereof and therapeutic application thereof
申请人:Carayon Pierre
公开号:US20060135575A1
公开(公告)日:2006-06-22
The invention relates to 2-acylamino-4-phenylthiazole derivatives of general formula (I):
pharmaceutically acceptable acid-addition salts thereof, hydrates or solvates of such derivatives or such pharmaceutically acceptable acid addition salts, intermediates thereto, processes for the preparation thereof, and therapeutic application thereof.
2-Amido-4-phenylthiazole Derivatives, The Preparation And The Therapeutic Use Thereof
申请人:CASELLAS Pierre
公开号:US20070259847A1
公开(公告)日:2007-11-08
The disclosure relates to 2-amido-4-phenylthiazole derivatives of general formula (I) below:
in which R
1
, R
2
, R
3
, Y, m, n, and p are as defined in the disclosure; as well as to their isomers, salts and solvates, to the pharmaceutical compositions containing them and to the therapeutic use thereof.
2-acylamino-4-phenylthiazole derivatives, preparation thereof and therapeutic application thereof
申请人:Sanofi-Aventis
公开号:US07504511B2
公开(公告)日:2009-03-17
The invention relates to 2-acylamino-4-phenylthiazole derivatives of general formula (I):
pharmaceutically acceptable acid-addition salts thereof, hydrates or solvates of such derivatives or such pharmaceutically acceptable acid addition salts, intermediates thereto, processes for the preparation thereof, and therapeutic application thereof.