Rhodium‐Catalyzed
<i>ortho</i>
‐Bromination of O‐Phenyl Carbamates Accelerated by a Secondary Amide‐Pendant Cyclopentadienyl Ligand
作者:Jin Tanaka、Yu Shibata、Anton Joseph、Juntaro Nogami、Jyunichi Terasawa、Ryo Yoshimura、Ken Tanaka
DOI:10.1002/chem.202000253
日期:2020.5.7
RhIII ] complex, bearing an acidic secondary amide moiety on the Cp ring, is able to catalyze the ortho-bromination of O-phenyl carbamates with N-bromosuccinimide (NBS) at room temperature. The presence of the acidic secondary amide moiety on the CpA ligand accelerates the bromination by the hydrogen bond between the acidic NH group of the CpA ligand and the carbonyl group of NBS.
已经确定,新开发的环戊二烯基铑(III)[CpA RhIII]配合物在Cp环上带有酸性仲酰胺部分,能够与N-溴代琥珀酰亚胺(NBS)催化邻氨基苯甲酸酯的邻溴化反应。在室温下。CpA配体上酸性仲酰胺部分的存在通过CpA配体的酸性NH基团和NBS的羰基之间的氢键加速了溴化反应。