A Rh(III)-catalyzed site-selective C–H activation of C(3)-functionalized indoles in a coupling with diazo esters has been realized with carbonyl as a weakly coordinating group. The coupling selectivity is dictated by the temperature and additives, affording either C4-alkylated indoles or C2-annulated lactones in moderate to excellent efficiency.
用羰基作为弱配位基团,已经实现了Rh(III)催化的C(3)-官能化的
吲哚与重氮酯偶联的位点C–H活化。偶联选择性由温度和添加剂决定,可以中等至极好的效率提供C4烷基化的
吲哚或C2环化的内酯。