Copper-promoted coupling of vinyl boronates and alcohols: a mild synthesis of allyl vinyl ethers.
A copper-promoted coupling of vinyl pinacol boronate esters and alcohols for the synthesis of enol ethers is reported. The reaction occurs in 50-99% yield and is compatible with a variety of functional groups. Cupric acetate is the copper source, and triethylamine buffer is used to prevent protodeboration; the reaction occurs at room temperature. In addition to excellent chemoselectivity, the reaction is stereospecific.
Shade
Ryan E
RE
Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, USA.
Hyde
Alan M
AM
Olsen
John-Carl
JC
Merlic
Craig A
CA