A straightforward aerobic oxidativeesterification of aryl aldehydes with alcohols has been developed for the synthesis of substituted esters by employing vitamin B1 as a cost-effective, metal-free, and eco-friendly NHC catalyst. Air is used as a green terminal oxidant. The reaction is a useful addition to the existing NHC-catalytic oxidativeesterification.
Purification of Fluorous Mitsunobu Reactions by Liquid-Liquid Extraction
作者:Dennis P. Curran、Reena Bajpai、Elizabeth Sanger
DOI:10.1002/adsc.200606187
日期:2006.8
Solvent tuning and partition coefficient measurements have identified suitable reagent and solvent combinations for the purification of fluorousMitsunobureaction products. The crude reaction mixtures are partitioned between 2/1 HFE-7100/FC-72 and DMF/10 % water to provide reagent (fluorous) and product (organic) fractions.