An iodoxybenzoic acid-mediated selected oxidative cyclization of N-hydroxyalkyl enamines was developed. Through this strategy, a variety of 2,3-disubstituted pyrroles and pyridines were produced in good selectivity involving oxidation of alcohol, followed by condensation of aldehyde and α-C of enamines. Furthermore, this metal-free method has several advantages, including the use of environmentally
Aminosilanes in organic synthesis. addition of organocopper reagents on γ-bis(trimethylsilyl)amino-α-acetylenic amides, esters and ketones. stereochemistry and some synthetic uses.
The stereochemical outcome of the carbocupration of γ-bis(trimethylsilyl)amino-α-acetylenic amide, esters and ketone was studied. A judicious choice of substrate, reagent and(or) reaction conditions allows to perform highly stereoselective cis or trans addition. The intermediate vinylic copper adducts, with (E) or (Z) configuration, react with electrophilic reagents to provide short routes to substituted
Pyridylpyrrole compounds useful as interleukin-and TNF antagonists
申请人:Pfizer Inc.
公开号:US06417202B1
公开(公告)日:2002-07-09
The present invention provides a compound of the formula:
and its pharmaceutically acceptable salts, wherein R1, R2, R3, R4, R5 and m are as defined in claim 1. The present invention also provides processes for the preparation thereof, the use thereof in treating cytokines mediated diseases and/or cell adhesion molecules (CAMs) mediated diseases and pharmaceutical compositions for use in such therapy.