1280227-58-8Relevant articles and documents
Competitive aryl-fluorine and aryl-halogen (Halogen = Cl, Br) bond cleavage with iridium porphyrin complexes
Qian, Ying Ying,Li, Bao Zhu,Chan, Kin Shing
supporting information, p. 1567 - 1570 (2013/05/08)
Base-promoted competitive Ar-F and Ar-X (X = Cl, Br) bond cleavage with iridium porphyrin complexes was investigated. Mechanistic studies suggested that Ir(ttp)- (ttp = 5,10,15,20-tetra-p-tolylporphyrinato dianion) cleaves the Ar-F bond via nucleophilic aromatic substitution and Ir 2(ttp)2 cleaves the Ar-X (X = Cl, Br) bond via metalloradical ipso substitution. Therefore, a stronger base, polar solvent, lower temperature, and iridium anion precursor favor Ar-F bond cleavage, while a weaker base, nonpolar solvent, higher temperature, and Ir2(ttp) 2 precursor favor Ar-X (X = Cl, Br) bond cleavage.
Base-promoted selective aryl carbon-bromine bond cleavage by Iridium(III) porphyrin for Iridium(III) porphyrin aryl synthesis: A metalloradical Ipso addition-elimination mechanism
Cheung, Chi Wai,Chan, Kin Shing
, p. 1768 - 1771 (2011/06/22)
K2CO3 was found to promote selective aryl carbon-bromine bond (Ar-Br) cleavage by a high-valent iridium(III) porphyrin carbonyl chloride (IrIII(ttp)(CO)Cl, ttp = 5,10,15,20-tetra-p- tolylporphyrinato dianion) in benzene so