Palladium/NHC-catalyzed tandem benzylic oxidation/oxidative esterification of benzylic alcohols with phenols
作者:Fang Luo、Changduo Pan、Jiang Cheng、Fan Chen
DOI:10.1016/j.tet.2011.06.060
日期:2011.8
A palladium/NHC-catalyzed tandembenzylicoxidation/oxidative esterification of benzylicalcohols with phenols to access aryl benzoate derivatives is described. The procedure tolerates a series of functional groups, such as methoxy, nitro, cyano, chloro, fluoro and bromo groups. Thus, it represents a practically alternative method to access aryl benzoate derivatives.
Ruthenium/NHC-catalyzed tandem benzylic oxidation/oxidative esterification of benzylic alcohols with phenols
作者:Di Zhang、Changduo Pan
DOI:10.1016/j.catcom.2011.12.041
日期:2012.4
An efficient methodology to access benzoate derivatives via tandembenzylicoxidation/oxidative esterification of benzylicalcohols with phenols catalyzed by ruthenium/NHC was developed. This operationally simple one-pot process uses O2 as the clean oxidant, producing esters in good to excellent yields.
The kinetic effect of a [20]paracyclophanebearing an imidazole moiety (1) on the deacylation of various p-nitrophenyl carboxylates was investigated in 10.9% (v/v) ethanol-1.0%(v/v) dioxane-water of μ 0.10 (KCl) at 40.0±0.1 °C. The facile reaction of 1 with a hydrophobic ester resulted in the accumulation of the NIm-acyl derivative of 1 along the progress of reaction, and the rate of regeneration of