Direct Syntheses of Styryl Ethers from Benzyl Alcohols via Ag Nanoparticle-Catalyzed Tandem Aerobic Oxidation
作者:Qi Zhang、Shuangfei Cai、Linsen Li、Yifeng Chen、Hongpan Rong、Zhiqiang Niu、Junjia Liu、Wei He、Yadong Li
DOI:10.1021/cs400295h
日期:2013.7.5
Ag nanoparticle-catalyzed aerobic oxidation of benzyl alcohols in basic DMSO gave efficient formation of styryl ethers, featuring single carbon transfer and C═C and C–O bond formation. A deuterium labeling experiment established that DMSO was the carbon source. Further experiments showed the reaction proceeded through a styryl sulfoxide intermediate originating from basic DMSO and transient benzaldehyde
Benzyl vinylethers have selectively been arylated at either α or β position by fine-tuned Heck-type palladium catalyses. In contrast to previous protocols, no excess of arylating reagent or substrate chelation is necessary. For achieving good yields and high α/β-selectivities various factors determining the catalytic system had to be optimized. The results of DFT computational studies correlate selectivity