A practical and efficient radical coupling of easily available arylthiodifluoroacetic acids and ethynylbenziodoxolone (EBX) reagents has been reported. Under transition metal-free conditions, aryl-substituted EBXs were converted to the corresponding ArSCF2-substituted alkynes in moderate to good yields, whereas TIPS-EBX underwent silver-catalyzed decarboxylative conditions to deliver the desired coupling
已经报道了容易获得的芳基
硫代
二氟乙酸和
乙炔基
苯并恶唑啉酮(EBX)试剂的实用和有效的自由基偶联。在无过渡
金属的条件下,芳基取代的EBX以中等至良好的产率转化为相应的ArSCF 2取代的
炔烃,而
TIPS-EBX则经过
银催化的脱羧条件以提供所需的偶联产物。通过将所得产物转化为其他ArSCF 2取代的
炔烃和烯烃,证明了该方案的合成效用。