[EN] IMIDAZOLE-4-CARBOXAMIDE DERIVATIVES, PREPARATION AND USE THEREOF FOR TREATMENT OF OBESITY<br/>[FR] PREPARATION ET UTILISATION DE DERIVES D'IMIDAZOLE DANS LE TRAITEMENT DE L'OBESITE
申请人:BAYER PHARMACEUTICALS CORPORAT
公开号:WO2003040107A1
公开(公告)日:2003-05-15
This invention relates to substituted imidazole derivatives of formula I, which have been found to suppress appetite and induce weight loss. The invention also provides methods for synthesis of the compounds, pharmaceutical compositions comprising the compounds, and methods of using such compositions for inducing weight loss and treating obesity and obesity-related disorders.
Preparation and use of imidazole derivatives for treatment of obesity
申请人:Smith A. Roger
公开号:US20050256167A1
公开(公告)日:2005-11-17
This invention relates to substituted imidazole derivatives which have been found to suppress appetite and induce weight loss. The invention also provides methods for synthesis of the compounds, pharmaceutical compositions comprising the compounds, and methods of using such compositions for inducing weight loss and treating obesity and obesity-related disorders.
Synthesis of 2-Oxazolone-4-carboxylates from 3-Nosyloxy- and 3-Bromo-2-ketoesters
作者:John F. Okonya、Robert V. Hoffman、M. Catherine Johnson
DOI:10.1021/jo010630z
日期:2002.2.1
New methods for the synthesis of 2-oxazolone-4-carboxylates from 3-nosyloxy- and 3-bromo-2-ketoesters are described. Condensation of 3-nosyloxy-2-ketoesters with methyl carbamate in refluxing toluene in the presence of p-TSA provided 2-oxazolone-4-carboxylates in good yields (41-80%). Alternatively, bromination of alpha-ketoesters with CuBr2 provided 3-bromo-2-ketoesters which condensed with methyl carbamate in the presence of p-TSA and AgOTf under similar conditions to provide 2-oxazolone-4-carboxylates in comparable yields (30-79%). The 2-oxazolone-4-carboxylates bear functionality that can be elaborated to a variety of potentially useful compounds. For example, some of these heterocycles were readily N-acylated, reduced to alcohols, or saponified and coupled with amino acids.
作者:Michael A. Calter、Ryan M. Phillips、Christine Flaschenriem
DOI:10.1021/ja055752d
日期:2005.10.1
Pyrimidine derivatives of the cinchona alkaloids function as excellent asymmetric catalysts for the "Interrupted" Feist-Bénary Reaction. This reaction produces highly substituted hydroxydihydrofurans from simple starting materials under mild conditions. The asymmetric reaction gives high enantioselectivities with unsubstituted bromoketones, and high enantio- and diastereoselectivities with substituted substrates. Mechanistic experiments suggest that the hydrobromide salt of the alkaloid derivative is the active catalyst for the reaction.