Nickel‐Mediated Trifluoromethylation of Phenol Derivatives by Aryl C−O Bond Activation
作者:Wei‐Qiang Hu、Shen Pan、Xiu‐Hua Xu、David A. Vicic、Feng‐Ling Qing
DOI:10.1002/anie.202004116
日期:2020.9.7
trifluoromethylation reactions. Tremendous efforts have focused on copper‐ and palladium‐mediated/catalyzed trifluoromethylation of aryl halides. In contrast, no general method exists for the conversion of widely available inert electrophiles, such as phenol derivatives, into the corresponding trifluoromethylated arenes. Reported herein is a practical nickel‐mediated trifluoromethylation of phenol derivatives with readily
[EN] 2H-1-BENZOPYRAN DERIVATIVES, PROCESSES FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS THEREOF<br/>[FR] DERIVES DE 2H-1-BENZOPYRAN, PROCEDES DE PREPARATION DE CES DERNIERS ET COMPOSITIONS PHARMACEUTIQUES DANS LESQUELS ILS ENTRENT
申请人:CHIESI FARMA SPA
公开号:WO2002059113A1
公开(公告)日:2002-08-01
2H-1-Benzopyran derivatives, processes for their preparation and use thereof for the preparation of pharmaceutical compositions for the prevention and treatment of postmenopausal pathologies.
2H-1-benzopyran derivatives, processes for their preparation and pharmaceutical compositions thereof
申请人:CHIESI FARMACEUTICI S.p.A.
公开号:EP1281710A1
公开(公告)日:2003-02-05
2H-1-benzopyran derivatives, processes for their preparation and use thereof for the preparation of pharmaceutical compositions for the prevention and treatment of postmenopausal pathologies.
The synthesis, binding affinity for estrogen receptor subtypes (ERalpha and ERbeta) and pharmacological activity on rat uterus of a new class of potent ligands, characterized by a 3-phenylbenzopyran scaffold with a basic side chain in position 4, are reported. Some of these compounds, endowed with very high receptor affinity, showed potent inhibition of agonist-stimulated uterine growth, with no or limited proliferative effect. Binding affinity mostly depended on the nature and position of substituents at the 3-phenyl ring, while the uterine activity seems to be affected by basic chain length. Compound 9c (CHF4227) showed excellent binding affinity and antagonist activity on the uterus. The docking of benzopyran derivatives explained the structure-affinity relationships observed for 3-phenyl substitution: a small, hydrophobic 4'-substituent could interact with a small accessory binding cavity, while di-substitution at 4' and 3' led to some ERalpha selectivity. This selectivity can be ascribed to differences in amino acid composition and side chain conformation in the region accommodating the 3-phenyl ring at human ERalpha and ERbeta ligand-binding domain. (C) 2004 Elsevier Ltd. All rights reserved.
2H-1-BENZOPYRAN DERIVATIVES, PROCESSES FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS THEREOF