In contrast to almost all of the known examples of Heck arylation of unsaturated alcohols, which yield predominately β-arylated products, arylation under the Pd-DPPP catalysis in ionic liquid leads preferentially to aryl substitution at the α carbon, providing an easy pathway to this valuable class of olefins.
与已知的不饱和醇的Heck芳基化反应几乎所有的例子(主要产生β-芳基化产物)不同,在
离子液体中,Pd-
DPPP催化下的芳基化反应优先导致α碳上的芳基取代,为这一类有价值的烯烃提供了便捷的合成途径。