Ligand-Enhanced Aliphatic Carbon−Carbon Bond Activation of Nitroxides by Rhodium(II) Porphyrin
摘要:
Rh(tmp) underwent Ph3P-enhanced aliphatic carbon carbon bond activation with various nitroxides. (Ph3P)Rh(tmp), rapidly formed from Rh(tmp) and Ph3P, enhanced the rate, selectivity, and yield in comparison to Rh(tmp). From kinetic studies, the rate of reaction showed a first-order dependence on both Rh(tmp) and TEMPO (TEMPO = 2,2,6,6-tetramethylpiperidine-1-oxyl) and saturation kinetics on Ph3P. The rate enhancement of (Ph3P)Rh(tmp) over Rh(tmp) was estimated to be about 11 at 70 degrees C.
Regioselective and Room-Temperature Carbon–Carbon Bond Activation of Cyclopropanes by Rhodium(II) Porphyrin
作者:Kin Chan、Shiyu Feng
DOI:10.1055/s-0036-1589129
日期:2018.4
Regioselective carbon–carbonbond activation of cyclopropanes by Rh II (tmp) (tmp = 5,10,15,20-tetramesitylporphyrinato dianion) was achieved at room temperature under neutral conditions to yield corresponding rhodium–porphyrin alkyls. This reaction can tolerate water, and functional groups are compatible.
在室温和中性条件下,Rh II (tmp) (tmp = 5,10,15,20-四甲基卟啉二价阴离子) 对环丙烷的区域选择性碳-碳键活化得到相应的铑-卟啉烷基。该反应可耐水,且官能团相容。