- Method for Direct Synthesis of Isosorbide Diketone from Isosorbide Using (2,2,6,6-Tetramethylpiperidin-1-yl)oxyl-based Derivatives and Transition Metal Nitrates
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According to an embodiment of the present disclosure, provided are: a (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO)-based derivative; and a method for direct synthesizing isosorbide diketone from isosorbide under mild reaction conditions without using highly toxic and corrosive acid components by improving reaction mechanism by a catalyst system comprising nitrates of a transition metal.COPYRIGHT KIPO 2020
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Paragraph 0088-0093; 0101-0113
(2020/04/17)
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- Ruthenium-supported Porous Graphene Catalyst and Method for Preparing Isohexide Diketone from Isohexide Using the Same
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According to a specific embodiment, disclosed is a method for converting isohexide to isohexide diketone under an oxidizing atmosphere using a porous graphene having good stability and high specific surface area as a support and using a catalyst on which ruthenium hydroxide is supported. The isohexide diketone manufactured according to the specific embodiment of the present disclosure can be effectively applied to various technical fields such as polymer building blocks, a medicine, biofuel production, a high value bio-monomer, and the like.COPYRIGHT KIPO 2019
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Paragraph 0146-0152
(2019/05/07)
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- Aerobic oxidation of isosorbide and isomannide employing TEMPO/laccase
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The oxidation of the renewable diols isosorbide and isomannide was successfully achieved using a TEMPO/laccase system. Furthermore, various TEMPO-derivatives were tested leading to conversions of up to >99% for the oxidation of isosorbide, isomannide, indanol and a halohydrin to the corresponding ketone. the Partner Organisations 2014.
- Gross, Johannes,Tauber, Katharina,Fuchs, Michael,Schmidt, Nina G.,Rajagopalan, Aashrita,Faber, Kurt,Fabian, Walter M. F.,Pfeffer, Jan,Haas, Thomas,Kroutil, Wolfgang
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p. 2117 - 2121
(2014/04/17)
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- CONTINUOUSLY OPERABLE METHOD FOR PRODUCING CARBONYL COMPOUNDS BY MEANS OF A CATALYST CONTAINING A NITROXYL RADICAL
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The invention relates to a method for the oxidation of a primary or secondary alcohol, preferably to form an aldehyde or ketone, comprising the following steps: a) providing a catalyst composition comprising at least one compound containing a nitroxyl radical, at least one NO source, at least one carbon or mineral acid or an anhydride of a carbon or mineral acid; b) producing a reaction mixture by adding at least one primary or secondary alcohol and a gas comprising oxygen and optionally one or more than one solvent to the catalyst composition from step a) or step e); c) incubating the reaction mixture from step b) at a temperature of between 0 and 100° C. or at the boiling point of the solvent; d) simultaneously with or subsequent to step c): crystallizing the reaction product; and e) recovering the catalyst composition by removing the crystallized reaction product from the reaction mixture obtained in step d).
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Paragraph 0062
(2014/02/16)
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- METHOD FOR PRODUCING ALDEHYDES AND KETONES FROM PRIMARY AND SECONDARY ALCOHOLS
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The invention relates to a method for producing aldehydes and ketones from easily accessible primary and secondary alcohols by oxidation with atmospheric oxygen or pure oxygen using a catalyst system which consists of a derivative of a free nitroxyl radical.
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Page/Page column 5
(2011/10/19)
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- METHOD FOR PRODUCING 2,6-DIOXABICYCLO-(3.3.0)-OCTANE-4,8-DIONE
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The invention relates to a method for producing 2,6-dioxabicyclo-(3.3.0)-octane-4,8-dione (I), comprising the oxidation of dianhydrohexitols (II-IV), or of corresponding hydroxy ketones, with an oxygen-containing gas in the presence of a catalyst composition, the reaction proceeding without the addition of halogen sources.
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Page/Page column 7-8
(2011/11/12)
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- Synthetic approach to N-alkylated 2,5-diamino-2,5-dideoxy-1,4;3,6- dianhydroalditols by reductive alkylation
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N,N'-Dialkylated 2,5-diamino-2,5-dideoxy-1,4;3,6-dianhydroalditols, representing interesting basic catalysts for polyaddition reactions, are synthesized by different reductive alkylation procedures in satisfactory yields. D-Gluco- and L-ido-N,N'-dialkyl-2,5-diamino-2,5-dideoxy-1,4;3,6- dianhydroalditols 7-8, 10-15 are accessible by reaction of the corresponding diamines with carbonyl compounds and reduction of the intermediately formed imine. For the synthesis of D-manno-N,N'-dialkylated diamines, an alternative route via 1,4;3,6-dianhydro-D-threo-2,5-hexodiulose (18) is established, thus avoiding the six-step synthesis towards 1,4;3,6-dianhydro-D-mannitol (2). Reductive alkylation of diketone 18 yields stereospecifically only the alkylated diamine 21 with D-manno-configuration. In case of the monoketones only 1,4;3,6-dianhydro-L-sorbose (16) can be transformed stereospecifically to N-2-pentyl-5-amino-5-deoxy-1,4;3,6-dianhydro-D-sorbitol (19), whereas 1,4;3,6-dianhydro-D-fructose (17) yields a mixture of D-manno- and D-gluco- monoamines 20a and 20b by reductive alkylation with 2-pentylamine and sodium borohydride.
- Limberg,Thiem
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p. 317 - 321
(2007/10/02)
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