Metallophthalocyanine-catalyzed cyclopropanation

Enantioselective Synthesis and Photoreactivity of a Diazirinyl-substituted (R)-β-Phenylalanine

“…The singlet-triplet gap is indeed small, which is in agreement with the possibility that the singlet carbene causes formation of all toluene adducts. There are also metal-catalyzed singlet carbene reactions with the solvent toluene, which had afforded product mixtures very similar to ours [48,49].…”

The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2014

“…1463) [1282]; and (14) copper-Tp complex catalyzed ring opening and functionalization of benzoxazoles using α-diazoesters [1283]. Other mechanistically-intensive investigations involving the reaction of Group 11 metal complexes and diazo compounds include: (1) new copper iminocarbene complexes as cyclopropanation and C-H insertion catalysts [1284]; (2) use of copper phthalocyanine complexes as cyclopropanation catalysts (a variety of other metals complexes of the same ligand were tried but were less effective) [1285]; (3) use of copper(II) nitrate for the formation of alkylideneinolines through intramolecular C-H insertion in an aqueous system [1286]; and (4) use of chiral copper iminopyridine complexes as cyclopropanation catalysts [1287]. Treatment of a diazo compounds featuring enantiotopic azide groups (e.g.…”

Heterogenized Platinum Group Metal Porphyrinates: Catalytic Activity in Liquid-Phase Hydrogenation Reactions

“…Ruthenium(II) aqua carbonyl 2,3,7,8,12,13,17,18-octaethylporphyrinate (RuOEP) was synthesized according to the known procedure [14] by refluxing for 3 min a phenolic solution of 2,3,7,8,12,13,17,18-octaethylporphyrin and Ru 3 (CO) 12 . The cooled reaction mixture was dissolved in chloroform, consequently washed with water, weak alkali and again water, then subjected to chromatography on silica gel eluting with a benzene:methanol 100:1 mixture.…”

“…[7] It stands to mention that the majority of studies covering the catalytic properties of porphyrins has been conducted on homogenous systems. [1,2,8,9] Therefore, extending the scope of the search for novel porphyrin catalysts unambiguously presents a significant scientific and practical interest.…”

“…An important matter, clearing of which would allow the synthesis of novel compounds with the desired set of properties, is finding correlations of adsorption and catalytic properties of porphyrins, in particular heterogenized on various carriers, with the structure of the macrocyclic ligand, the nature of the central metal atom [1,2,8,9] and the reaction medium. [10] Thus, particularly interesting are the porphyrins with pronounced electron-withdrawing properties that can act as electron scavengers and stabilize the central metal cation in lower oxidation states or unusual spin states.…”