Dehydrogenative Heck Reaction of Furans and Thiophenes with Styrenes under Mild Conditions and Influence of the Oxidizing Agent on the Reaction Rate
作者:Alexandre Vasseur、Jacques Muzart、Jean Le Bras
DOI:10.1002/chem.201101992
日期:2011.11.4
CH vs. CBr in Heck: The direct dehydrogenative coupling of furans and thiophenes with styrenes occurs under mild conditions (see scheme). This method allows the coupling of brominated substrates through CH bond activation. In addition, DMSO and benzoquinone had a positive effect on the reaction rate.
Zeolite Y nanosheets with micro-meso-macroporous structure was synthesized, and applied to assemble Pd catalyst (Pd/NS-Y) for direct vinylation of thiophenes in high activity and selectivity, as compared to Pd(OAc)2, Pd(NO3)2,...