Chemoselective esterification of α-hydroxyacids catalyzed by salicylaldehyde through induced intramolecularity
作者:Shiue-Shien Weng、Hsin-Chun Li、Teng-Mao Yang
DOI:10.1039/c2ra23068b
日期:——
direct and chemoselective esterification of α-hydroxyacids was developed using a reversible covalent-binding strategy. By taking advantage of acetal chemistry, simple aldehydes can be used to efficientlycatalyze the esterification of α-hydroxy carboxylic acids in the presence of β-hydroxyacid moieties or other carboxylic acids in amounts equal to or in excess of the alcohols. A diverse array of α-aryl
NHC-coordinated cyclometalated palladium(II) catalyzed addition of arylboronic acids to methyl 2-hydroxy-2-methoxyacetate gave corresponding various functionalized methyl mandelate derivatives in good yields.
The present invention relates to compounds useful of inhibitors of protein kinases. The invention also provides processes for preparing the compounds of this invention, pharmaceutically acceptable compositions comprising the compounds of the invention, and methods of using the compositions in the treatment of various disorders.