Sterically Enhanced, Selective C(CO)−C(α) Bond Cleavage of a Ketones by Rhodium Porphyrin Methyl
摘要:
Selective carbon(CO) carbon(a) bond activation of ketones was achieved by rhodium(III) 5,10, 15,20-tetrakis-4-toylporphyrinato methyl (Rh(ttp)Me (1)) to yield the corresponding rhodium porphyrin acyls at temperatures as low as 50 degrees C. More hindered isopropyl ketones were much more reactive than ethyl or methyl ketones. Rh(ttp)OH(3a)was proposed to be the intermediate to cleave the C(CO)-C(alpha) bond.
DOI:
10.1021/om1007852
作为产物:
描述:
Rh(ttp)Me 、 苯乙酮 以
neat (no solvent) 为溶剂,
以100%的产率得到Rh(ttp)CH2COPh