109781-47-7Relevant academic research and scientific papers
Facile and practical synthesis of platinum(II) porphyrins under mild conditions
Yamashita, Ken-Ichi,Katsumata, Natsuki,Tomita, Shohei,Fuwa, Miki,Fujimaki, Keisuke,Yoda, Takuya,Hirano, Daisuke,Sugiura, Ken-Ichi
, p. 492 - 494 (2015)
A facile and mild method for the preparation of platinum(II) porphyrin complexes is reported. A simple treatment of freebase porphyrins with 1.5 equiv of [PtCl2(PhCN)2] in the presence of sodium propionate in refluxing chlorobenzene (bp: 131°C) affords the corresponding Pt(II) complexes in good yields within a few hours. Furthermore, the work-up processes for our methods are less complex than those for the reported ones because chlorobenzene can be easily removed by simple evaporation.
Hydrogen bond controlled formation of trans-dihydroxo porphyrinato platinum(IV) complexes: Synthesis, characterization and catalytic activity in olefin epoxidation
Alemohammad, Tahereh,Safari, Nasser,Rayati, Saeed,Gheidi, Mahin,Mortazavimanesh, Anahita,Khavasi, Hamidreza
, p. 198 - 208 (2015/06/23)
A number of trans-dihydroxo porphyrinato platinum(IV) complexes, [(porp)PtIV(OH)2] have been synthesized and characterized from their platinum(II)-porphyrin precursors by spectroscopic methods. The crystal structure of the platinum complex of trans-dihydroxo-meso-tetramesitylporphyrinato platinum(IV) meta-chlorobenzoic acid ([(TMP)PtIV(OH)2](m-CBA)2) has also been determined. The porphyrin periphery is planar and the platinum atom has a slightly distorted octahedral environment. It must be noted that there is a very strong O-H?O hydrogen bond between the hydrogen atoms of m-chlorobenzoic acids and the two hydroxo ligands coordinated to the platinum center. This crystal structure has been previously described by us as trans-dihydroxo-meso-tetramesitylporphyrinato platinum(VI) meta-chlorobenzoate ([(TMP)PtVI(OH)2](m-CB)2), but the spectroscopic data has been reinterpreted due to the contradictory +6 oxidation state for platinum. The UV-Vis and NMR spectroscopic data suggest that the porphyrin skeleton is similar to that of normal porphyrins and are also indicative of the +4 oxidation state for platinum. Cyclic voltammetry studies also indicate that PtIITMP can oxidize up to PtIV(TMP+) species via three successive one-electron oxidation steps. The results of DFT studies and NBO analysis confirm that platinum has +4 oxidation state in both [(TMP)Pt(OH)2](m-CBA)2 and [(TMP)Pt(OH)2](m-CB)2 complexes. The catalytic activity of these porphyrin complexes has been investigated for the oxidation of various alkenes in the presence of iodosylbenzene.
A robust palladium(II)-Porphyrin complex as catalyst for visible light induced oxidative C-H functionalization
To, Wai-Pong,Liu, Yungen,Lau, Tai-Chu,Che, Chi-Ming
, p. 5654 - 5664 (2013/06/04)
A series of palladium(II)-porphyrin complexes that display dual emissions with lifetimes up to 437μs have been synthesized. Among the four complexes, PdF20TPP is an efficient and robust catalyst for photoinduced oxidative C-H functionalization by using oxygen as terminal oxidant. α-Functionalized tertiary amines were obtained in good to excellent yields by light irradiation (λ>400nm) of a mixture of PdF20TPP, tertiary amine, and nucleophile (cyanide, nitromethane, dimethyl malonate, diethyl phosphite, and acetone) under aerobic conditions. Four examples of intramolecular cyclized amine compounds could be similarly prepared. Comparison of the UV-visible absorption spectra before and after the photochemical reaction revealed that PdF20TPP was highly robust (>95 % recovery). The practical application of PdF20TPP has been revealed by the photochemical reactions performed by using a low catalyst loading (0.01mol %) and on a 10mmol scale. The PdF20TPP catalyst could sensitize photoinduced oxidation of sulfides to sulfoxides in excellent yields. Mechanistic studies revealed that the photocatalysis proceeded by singlet-oxygen oxidation. Long-lived excited states! A series of palladium(II)-porphyrin complexes have been synthesized and found to display long-lived excited states with lifetimes up to 437μs (see scheme). Among these complexes, PdF 20TPP is an efficient and robust catalyst for a broad array of photoinduced oxidative C-H functionalization reactions. PtF20TPP= platinum(II) meso-tetrakis(2,3,4,5,6-pentafluorophenyl)porphyrin.
NOVEL SUGAR-LINKED CHLORIN DERIVATIVE AND PROCESS FOR PRODUCTION THEREOF
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Page/Page column 18, (2009/12/07)
Disclosed is a novel glycoconjugated chlorin derivative which is useful as a substance for photodynamic therapy, is stable, and can act a photosensitizer having high phototoxicity even when used in a small quantity. Also disclosed is a method of producing the derivative. Specifically disclosed are a S-glycosylated chlorin derivative represented by the following general formula (1) and a metal complex thereof. In the general formula (1), X1 to X20 independently represent a group selected from the group consisting of F-, sugar-S-, sugar-Z-Sand sugar-O-Z-S- and at least one among X1 to X20 represents a group selected from the group consisting of sugar-S-, sugar-Z-S- and sugar-O-Z-S- (wherein F represents a fluorine atom, Z represents an oxygen atom, Z represents a hydrocarbon group having 1 to 6 carbon atoms); and R5 and R6 independently represent a hydrogen atom or an organic group or may together form a ring.
