Suzuki reaction of aryl bromides and arylboronicacids is developed. The cross-coupling reactions can be performed at room temperature using 5.0 equiv. of Et3N as solvent and base without any ligands, and affording biaryl products in good yields. In addition, the chemoselecitive Suzuki reaction of bromo-N-methyliminodiacetic acid (MIDA) boronates with arylboronicacids can be achieved in this system, and
Suzuki–Miyaura reaction protocol of using bromophenyl fluorosulfonate as building block for the preparation of unsymmetrical terphenyls. The chemoselective cross-coupling of bromophenyl fluorosulfonate and arylboronicacids can be achieved by controlling base species without using any ligands. Under this methodology, various of m- and p-unsymmetrical terphenyls were obtained in moderate to good yields.
Horner―Wadsworth―Emmons reaction of stannylvinylphosphonates with aldehydes and mild thermal cyclisation provides disubstituted arylstannanes. Subsequent Stille coupling leads to regiospecificsynthesis of m- and p-terphenyls.