- Synthesis of metal complexes of 2,9-bis(2-hydroxyphenyl)-1,10-phenanthroline and their DNA binding and cleaving activities
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A series of metal complexes that combine the structure of phenanthroline and salen have been synthesized and characterized by electron paramagnetic resonance spectroscopy. The effects of the 2,9-bis(2- hydroxyphenyl)-1-10-phenanthroline compounds complexe
- Routier, Sylvain,Joanny, Valerie,Zaparucha, Anne,Vezin, Herve,Catteau, Jean-Pierre,Bernier, Jean-Luc,Bailly, Christian
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- METHOD FOR PRODUCING LINEAR AND/OR CYCLIC CARBONATE ESTERS
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Preparing linear and/or cyclic carbonate ester, comprises reacting an epoxide with carbon dioxide in the presence of a catalyst. The catalyst comprises a metal complex (IIa) or (IIb) with a ligand (IIc). The metal (IIa) is present in an oxidation state of >= 0. Preparing linear and/or cyclic carbonate ester, comprises reacting an epoxide with carbon dioxide in the presence of a catalyst. The catalyst comprises a metal complex of formula (M) (IIa) or (MA) (IIb) with a ligand of formula (L) (Iic). The metal (IIa) is present in an oxidation state of >= 0. A : halo, carboxylate, phenoxide, sulfonate, phosphonate, alkyl, alkoxy or amido; L : (Ia) or (Ib), where OH groups may be deprotonated; R1-R4 : H, 1-22C alkyl, 5-12C cycloalkyl, 7-14C aralkyl or 7-14C alkylaryl or 6-14C aryl; X : amine moiety of formula (II) or alkane moiety of formula (III); R5 : 1-22C alkyl, 5-12C cycloalkyl, 7-14C aralkyl, or 7-14C alkylaryl, 6-14C aryl, or optionally alkyl-substituted pyridyl or pyridylmethyl; R6, R7 : H, 1-22C alkyl, 5-12C cycloalkyl, 7-C14-aralkyl or alkylaryl, 6-14C aryl or -COOR8; and R8 : 1-8C alkyl. Independent claims are also included for: (1) the polymeric carbonate ester, which is obtained by the reaction of cyclic epoxide with carbon dioxide by the above mentioned method, where the number average molecular weight of polymeric carbonate ester determined by gel permeation chromatography is >= 500 g/mole to = 5000 g/mole and the polydispersity index is >= 1 to = 1.5; and (2) a metal complex of formula (XIX) or (XX). M1 : Cr(III)-A, Co(III)-A or Zn(II). [Image] [Image] [Image].
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- METHOD FOR PRODUCING LINEAR AND/OR CYCLIC CARBONATE ESTERS
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The present invention relates to a method for producing linear and/or cyclic carbonate esters, involving the step of reacting an epoxide with carbon dioxide in the presence of a catalyser. The invention further relates to the use of special catalysers for reacting epoxides with carbon dioxide, special catalysers and special reaction products. The catalyser comprises a complex of a metal M or M-A with a ligand L, the metal M being present in an oxidation state of >=0, A standing for halide, carboxylate, phenolate, sulfonate, phosphonate, alkyl, alkoxy or amido, and the ligand L having the subsequent structure (Ia) or (Ib), wherein one or both of the OH groups shown in (Ia) and/or (Ib) can also be deprotonated.
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Paragraph 0086-0090
(2015/07/27)
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- Oxidative carbonylation of aniline with new cobalt catalytic systems
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New neutral cobalt(II) complexes containing 2,9-bis(2-hydroxyphenyl)-1,10- phenanthroline and 2,9-bis(2-hydroxyphenyl)-2,2′-bipyridine ligands have been synthesized. These complexes are active catalysts in the oxidative carbonylation of aniline in 1-butanol and NaI as a promoter. The principal products obtained are N,N′-diphenylurea and 1-butyl-N-phenylcarbamate.
- Orejon, Aranzazu,Castellanos, Aida,Salagre, Pilar,Castillon, Sergio,Claver, Carmen
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p. 764 - 768
(2007/10/03)
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