6093-01-2Relevant articles and documents
Triplet halocarbene chemistry: P-nitrophenylchlorocarbene and p-nitrophenylbromocarbene
Moss, Robert A.,Lu, Zhifeng,Sauers, Ronald R.
body text, p. 5940 - 5942 (2010/11/21)
Reactions of p-nitrophenylchlorocarbene with cumene and of p-nitrophenylbromocarbene with toluene afford C-H abstraction-recombination products that suggest the involvement of triplet arylhalocarbenes.
Remarkably stable iron porphyrins bearing nonheteroatom-stabilized carbene or (alkoxycarbonyl)carbenes: Isolation, X-ray crystal structures, and carbon atom transfer reactions with hydrocarbons
Li, Yan,Huang, Jie-Sheng,Zhou, Zhong-Yuan,Che, Chi-Ming,You, Xiao-Zeng
, p. 13185 - 13193 (2007/10/03)
Reactions of [Fe(TPFPP)] (TPFPP = meso-tetrakis(pentafluorophenyl)porphyrinato dianion) with diazo compounds N2C(Ph)R (R = Ph, CO2Et, CO2CH2CH=CH2) afforded [Fe(TPFPP)(C(Ph)R)] (R = Ph (1), CO2Et (2), CO2CH2CH=CH2 (3)) in 65-70% yields. Treatment of 1 with N-methylimidazole (Melm) gave the adduct [Fe(TPFPP)(CPh2)(Melm)] (4) in 65% yield. These new iron porphyrin carbene complexes were characterized by NMR and UV-vis spectroscopy, mass spectrometry, and elemental analyses. X-ray crystal structure determinations of 1·0.5C6H6·0.5CH2Cl2 and 4 reveal Fe=CPh2 bond lengths of 1.767(3) (1) and 1.827(5) A (4), together with large ruffling distortions of the TPFPP macrocycle. Complexes 2 and 4 are reactive toward styrene, affording the corresponding cyclopropanes in 82 and 53% yields, respectively. Complex 1 is an active catalyst for both intermolecular cyclopropanation of styrenes with ethyl diazoacetate and intramolecular cyclopropanation of allylic diazoacetates. Reactions of 2 and 4 with cyclohexene or cumene produced allylic or benzylic C-H insertion products in up to 83% yield.