Catalytic C–C Bond Formation Promoted by Mg–Al–O–t-Bu Hydrotalcite

Choudary, B. M.; Kantam, M. Lakshmi; Kavita, B.; Reddy, Ch. Venkat; Figuéras, F.

doi:10.1016/s0040-4020(00)00906-6

Cited by 99 publications

(53 citation statements)

References 33 publications

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“…When the catalysts were rehydrated for 2 days at room temperature, the calcined sample could not be restructured into hydrotalcite [7][8]. These results are in good agreement with the reported data that restructured calcined Ni-Al hydrotalcite requires stringent conditions [16][17]24]. …”

Section: Catalysts Characterization: Xrd Of Hydrotalcitessupporting

confidence: 83%

“…Thermal calcination of these materials results in the formation of non-stoichiometric mixed metaloxides with characteristic properties, which are extremely active catalysts for many important transformations. Various catalytic applications of htlc are such as steam reforming, methanol and higher alcohol synthesis [6], selective oxidation of alcohols to aldehydes [7], and reduction of aldehydes to alcohols [8], epoxide ring opening [9], epoxidation [10], Aldol condensation [11], cyanoethylation [12], Micheal reaction [13], and transterification [14]. Pinnavaia [15] and co-workers reported excellent work on intercalation of polyoxometallates as anion pillars and exploited them in selective oxidation reactions [16].…”

Section: Introductionmentioning

confidence: 99%

“…During the past decade strong impetus was given to modify these materials for the synthesis of fine chemicals, exploring both basic and redox properties. Recently Choudary et al [17] reported oxidative bromination of bisphenol-A excellent activity for osmate intercalated hydrotalcite for asymmetric dihyroxylation of various aliphatic and aromatic olefins [18] using NMO (N-methylmorpholine N-oxide) as co-oxidant. The maximum amount of water present in the interlayer can be calculated on the basis of sites present in the close packed configuration of oxygen atoms, as discussed here Kannan [19] reported intercalation of metallophthallocyanine tetrasulfonate in the intergallery of Mg-Al hydrotalcite which is synthesized by different routes.…”

Section: Introductionmentioning

confidence: 99%

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Structure, Characterization and Application of Ni Hydrotalcite as Solid Base Catalysts for Organic Transformations

Rahman¹,

Al‐Deyab²

2011

J. Chil. Chem. Soc.

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Ni hydrotalcites with different kinds of metals, ions exhibit considerable activity for organic transformations. Various ratios of Ni-Al hydrotalcites are prepared by using different compositions are characterized by XRD, IR and TPR analysis. Carbonate in the brucite sheets is active for selective oxidation reactions. Upon calcination the dehydroxylation of the hydrotalcite and concurrent decomposition of the carbonate ions produce mixed oxides which exhibits activity for variety of organic transformations.

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Section: Catalysts Characterization: Xrd Of Hydrotalcitessupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structure, Characterization and Application of Ni Hydrotalcite as Solid Base Catalysts for Organic Transformations

Rahman¹,

Al‐Deyab²

2011

J. Chil. Chem. Soc.

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“…Characterization of the products. The spectroscopic characteristics of already known products 3a 56 , 3b 57 , 3c 58 , 3e 59 , 3f 60 , 3g 61 , 3i 62 , 3j 63 , 3l 64 , 3m 65 , 3n 66 , 3o 67 , 3p 68 , 3q 66 …”

Section: Discussionmentioning

confidence: 99%

L-Proline catalysed Michael additions of different methylene active compounds to α-enones in ionic liquid

Kotrusz¹,

Tomá²

2006

Arkivoc

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L-Proline catalysed Michael addition of different active methylene compounds to α-enones in [bmim]PF 6 was studied. Only 5 mol% of L-proline was necessary to achieve good yields of the products, but practically no stereoselectivity was observed. Reactions went smoothly with methyl vinyl ketone, benzylideneacetone as well as chalcone. Only medium yields of the product were isolated at additions to cyclohex-2-ene-1-one.

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“…Thermal calcinations of these materials results in the formation of non-stoichiometric mixed metal-oxides having characteristic properties, which are extremely active catalysts for many important organic transformations including the reduction of aldehydes to alcohols, epoxide ring opening, epoxidation, aldol condensation, transesterification, and Knoevenegal condensation [16][17][18][19][20][21][22][23]. Choudary [18] reported the oxidative bromination of bisphenol-A and excellent activity of Osmate-intercalated HT for asymmetric dihydroxylation of various aliphatic and aromatic olefins using NMO (N-methylmorpholine N-oxide) as co-oxidant [16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Environment-Friendly Reduction of Aromatics to Alicyclic Compounds at Room Temperature Using Superactive Calcined Ni-Al Hydrotalcite Catalysts

Rahman¹

2016

AJAC

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Calcined Ni-Al hydrotalcite (HT) 2: 1, Cat. A, is a superactive catalyst for reduction of substituted aromatics, i. e. toluene, benzene, nitrobenzene, chloro-, bromo-, and iodobenzene to their respective alicyclic products at room temperature in the presence of molecular hydrogen. Cat. A attained higher conversions compared to calcined Ni-Al hydrotalcites with ratios of 2.5: 1, and 3: 1. Calcined Ni-Al HT is a superactive catalyst whereas catalysts Niγ-Al 2 O 3 or Ni-SiO 2 with Ni contents of 2%, 5%, and 10% resulted in poor conversions. In these cases, Ni in association with the respective oxide is the active precursor for molecular hydrogen initiation in the reduction of aromatics to alicyclic compounds. The objective is to evalua4e Ni as the best catalyst for aromatic ring reduction to alicylic molecule. Quantitative yield were obtained for all the substrates toluene, benzene, nitrobenzene, chloro-, bromo-, and iodobenzene to their respective cyclohexanes. These results indicate that hydrogenation with reusable Ni-Al HT catalysts is a green sustainable process and atom economy efficient for the production of various alicyclic compounds.

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Catalytic C–C Bond Formation Promoted by Mg–Al–O–t-Bu Hydrotalcite

Cited by 99 publications

References 33 publications

Structure, Characterization and Application of Ni Hydrotalcite as Solid Base Catalysts for Organic Transformations

Structure, Characterization and Application of Ni Hydrotalcite as Solid Base Catalysts for Organic Transformations

L-Proline catalysed Michael additions of different methylene active compounds to α-enones in ionic liquid

Environment-Friendly Reduction of Aromatics to Alicyclic Compounds at Room Temperature Using Superactive Calcined Ni-Al Hydrotalcite Catalysts

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