- Iron-Catalyzed Direct Julia-Type Olefination of Alcohols
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Herein, we report an iron-catalyzed, convenient, and expedient strategy for the synthesis of styrene and naphthalene derivatives with the liberation of dihydrogen. The use of a catalyst derived from an earth-abundant metal provides a sustainable strategy to olefins. This method exhibits wide substrate scope (primary and secondary alcohols) functional group tolerance (amino, nitro, halo, alkoxy, thiomethoxy, and S- A nd N-heterocyclic compounds) that can be scaled up. The unprecedented synthesis of 1-methyl naphthalenes proceeds via tandem methenylation/double dehydrogenation. Mechanistic study shows that the cleavage of the C-H bond of alcohol is the rate-determining step.
- Landge, Vinod G.,Babu, Reshma,Yadav, Vinita,Subaramanian, Murugan,Gupta, Virendrakumar,Balaraman, Ekambaram
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p. 9876 - 9886
(2020/09/03)
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- Nickel(ii)-catalyzed direct olefination of benzyl alcohols with sulfones with the liberation of H2
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A nickel(ii)-catalyzed direct olefination of benzyl alcohols with sulfones to access various terminal and internal olefins with the liberation of hydrogen gas is reported.
- Landge, Vinod G.,Yadav, Vinita,Subaramanian, Murugan,Dangarh, Pragya,Balaraman, Ekambaram
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supporting information
p. 6130 - 6133
(2019/06/03)
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- Light driven decarboxylative cross coupling of acrylic acid and iodobenzene using [Mo132] type keplerate as a catalyst
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Photochemical decarboxylative cross coupling reaction is one of the most significant research areas in industrial chemistry. Many research groups working on the topic use a photoredox catalyst merged with another coordination catalyst. The major problem in this case is the cost of such a cooperative catalyst system. Thus, to reduce the cost of the catalyst, designing a self-sufficient catalyst system is required. In our present work we have synthesized a giant molybdenum based polyoxometalate which acts as a photocatalyst as well as a coordination catalyst. We have shown that acrylic acid gets decarboxylated in the presence of UV light and gets coupled with iodobenzene to form styrene with maximum yield of 62%. The catalyst material is also stable under the reaction conditions and hence it is reusable.
- Das, Santu,Misra, Archismita,Roy, Soumyajit
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- SLOW RELEASE OF ORGANOBORONIC ACIDS IN CROSS-COUPLING REACTIONS
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A method of performing a chemical reaction includes reacting a compound selected from the group consisting of an organohalide and an organo-pseudohalide, and a protected organoboronic acid represented by formula (I) in a reaction mixture: R1-B-T; where R1 represents an organic group, T represents a conformationalIy rigid protecting group, and B represents boron having sp3 hybridization. When unprotected, the corresponding organoboronic acid is unstable by the boronic acid neat stability test. The reaction mixture further includes a base having a pKB of at least 1 and a pal ladium catalyst. The method further includes forming a cross-coupled product in the reaction mixture.
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Page/Page column 45, 48
(2010/04/27)
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