Regioselective Palladium Cross-Coupling of 2,4-Dihalooxazoles: Convergent Synthesis of Trisoxazoles

Abstract
A regioselective Suzuki−Miyaura cross-coupling of 2,4-dihalooxazoles followed by a Stille coupling has been successfully developed. The procedure affords convergent syntheses of trisoxazoles in high yield and in a minimum number of steps.