IrCl(cod)2]/dppe-catalyzed α-methylation of aryl esters using methanol as the C1 source was developed. This methylation process is useful in several fields including organic chemistry, biochemistry, and medicinal chemistry. Readily available methanol as methylation reagent was successfully adapted. The reaction processed high atom economy and efficient. By applying the reaction system, the synthesis method of naproxen
Palladium-Catalyzed α-Arylation of Carboxylic Acids and Secondary Amides via a Traceless Protecting Strategy
作者:Zhi-Tao He、John F. Hartwig
DOI:10.1021/jacs.9b03291
日期:2019.7.31
for the long-standing challenge of conducting the palladium-catalyzed α-arylation of carboxylic aids and secondaryamides with aryl halides. Both of the presented coupling processes occur with a variety of carboxylic acids and amides and with a variety of aryl bromides containing a broad range of functional groups, including base-sensitive functionality like acyl, alkoxycarbonyl, nitro, cyano, and even
[EN] CHEMICAL COMPOUNDS<br/>[FR] COMPOSES CHIMIQUES
申请人:LILLY ICOS LLC
公开号:WO2002000657A2
公开(公告)日:2002-01-03
Compounds of the general structural formula (I) and use of the compounds and salts and solvates thereof, as therapeutic agents. In particular, the invention relates to compounds that are potent and selective inhibitors of cyclic guanosine 3', 5'-monophosphate specific phosphodiesterase (cGMP-specific PDE), in particular PDE5.