Soumi Laha

Followers

Following

Public Views

Jonathan Zittrain

Harvard University

Mariya Ivancheva

University of Strathclyde, Glasgow

Benjamin Isakhan

Deakin University

David Seamon

Kansas State University

Armando Marques-Guedes

UNL - New University of Lisbon

Joshua Hanan

University of Denver

María Rebeca Padilla de la Torre

Universidad Autónoma de Aguascalientes

Yael Navaro

University of Cambridge

Paolo Carta

University of Trento

Sandeep Mertia

Stevens Institute of Technology

Interests

Uploads

Papers by Soumi Laha

Nanocrystalline copper(II) oxide catalyzed aza-Michael reaction and insertion of α-diazo compounds into N–H bonds of amines

Tetrahedron Letters, Aug 1, 2009

... Nanocrystalline copper(II) oxide catalyzed aza-Michael reaction and insertion of α-diazo comp... more

Synthesis of Propargylamines by Three-Component Coupling of Aldehydes, Amines and Alkynes Catalyzed by Magnetically Separable Copper Ferrite Nanoparticles

Synlett, Jun 12, 2009

... 14d Kantam ML, Laha S, Yadav J, Choudary BM, Sreedhar B,Adv. Synth. Catal. 2006, 348: 867. 14... more

Correction: A multi-component reaction for the synthesis of pyrido [1,2-b] isoquinoline derivatives via the [3 + 2] cycloaddition reaction between alkynes and in situ generated isoquinolinium ylides

Organic and Biomolecular Chemistry, 2020

Correction: A multi-component reaction for the synthesis of pyrido [1,2-b] isoquinoline derivativ... more

Download

Friedel—Crafts Alkylation of Indoles with Epoxides Catalyzed by Nanocrystalline Titanium(IV) Oxide

ChemInform, Dec 5, 2006

Friedel-Crafts alkylation of indoles with epoxides to afford 3-alkyl indole derivatives at room t... more

Download

Synthesis of Propargylamines with Copper Ferrite Nanoparticles

Synfacts, Sep 22, 2009

Download

Asymmetric Hydrosilylation of Ketones by Copper Ferrite Nanoparticles

Synfacts, Aug 21, 2009

Copper‐Impregnated Magnesium‐Lanthanum Mixed Oxide: A Reusable Heterogeneous Catalyst for Allylation of Aldehydes and Ketones

Advanced Synthesis & Catalysis, Jan 30, 2020

Copper-impregnated magnesium-lanthanum mixed oxide [Cu(II)/Mg-La] was used as catalyst in synthes... more Copper-impregnated magnesium-lanthanum mixed oxide [Cu(II)/Mg-La] was used as catalyst in synthesis of homoallylic alcohols from aldehydes and ketones using allyltributylstannane as the allylating source. The present protocol provides a great application potential for the synthesis of corresponding allyl alcohols with excellent yields and selectivity. The catalyst exhibits broad functional group compatibility with a variety of substituted aldehydes and ketones to furnish the desired products in high yields under heterogeneous conditions. Importantly, the heterogeneous catalyst could be recovered from the reaction mixture by centrifugation and used up to three cycles.

Download

Asymmetric Hydrosilylation of Prochiral Ketones Catalyzed by Nanocrystalline Copper(II) Oxide

Advanced Synthesis & Catalysis, Jul 2, 2007

Asymmetric hydrosilylation of aryl alkyl ketones to afford chiral secondary alcohols with good yi... more

Download

Pd‐Catalyzed One‐Pot Sequential Sonogashira Coupling and Dual Annulations Cascade for the Synthesis of Benzofuro[3,2‐c]‐Triazalo/Pyrrolo‐Quinolines

Advanced Synthesis & Catalysis

Palladium‐catalyzed coupling reaction followed by dual annulation has been achieved for the synth... more Palladium‐catalyzed coupling reaction followed by dual annulation has been achieved for the synthesis of various triazolo/pyrrolo fused benzofuro‐quinolines from readily available starting materials. The developed protocol proceeds through palladium‐catalyzed Sonogashira coupling, benzannulation followed by C−H activation triggered second annulation reaction cascades in a single pot. In particular, the polycyclic compound formed by this method consists of three different heterocyclic structures: benzofuran, quinoline, and triazole/pyrrole. The method provides simple access to obtain a range of fused benzofurotriazalo/pyrrolo‐quinolines in good to moderate yields.magnified image

Correction: A multi-component reaction for the synthesis of pyrido [1,2-b] isoquinoline derivatives via the [3 + 2] cycloaddition reaction between alkynes and in situ generated isoquinolinium ylides

Organic & Biomolecular Chemistry, 2020

Correction for ‘A multi-component reaction for the synthesis of pyrido [1,2-b] isoquinoline deriv... more Correction for ‘A multi-component reaction for the synthesis of pyrido [1,2-b] isoquinoline derivatives via the [3 + 2] cycloaddition reaction between alkynes and in situ generated isoquinolinium ylides’ by Sundar S. Shinde et al., Org. Biomol. Chem., 2019, 17, 4121–4128, DOI: 10.1039/C9OB00560A.

Download

Copper‐Impregnated Magnesium‐Lanthanum Mixed Oxide: A Reusable Heterogeneous Catalyst for Allylation of Aldehydes and Ketones

Advanced Synthesis & Catalysis, 2020

Copper‐impregnated magnesium‐lanthanum mixed oxide [Cu(II)/Mg−La] was used as catalyst in synthes... more Copper‐impregnated magnesium‐lanthanum mixed oxide [Cu(II)/Mg−La] was used as catalyst in synthesis of homoallylic alcohols from aldehydes and ketones using allyltributylstannane as the allylating source. The present protocol provides a great application potential for the synthesis of corresponding allyl alcohols with excellent yields and selectivity. The catalyst exhibits broad functional group compatibility with a variety of substituted aldehydes and ketones to furnish the desired products in high yields under heterogeneous conditions. Importantly, the heterogeneous catalyst could be recovered from the reaction mixture by centrifugation and used up to three cycles.magnified image

Download

A multi-component reaction for the synthesis of pyrido [1,2-b] isoquinoline derivatives via the [3 + 2] cycloaddition reaction between alkynes and in situ generated isoquinolinium ylides

Organic & Biomolecular Chemistry, 2019

Metal-free unprecedented [3 + 2] cycloaddition of alkynes and isoquinolinium ylide generated in s... more

Nano Copper(0)-Stabilized on Alumina: Efficient and Recyclable Heterogeneous Catalyst for Chemoselective Synthesis of 1,2-Disubstituted Benzimidazoles and Quinoxalines in Aqueous Medium

Catalysis Letters, 2017

ranges of substituted o-phenylenediamines and aldehydes or α-bromo ketones were used to achieve t... more

Download

Asymmetric Hydrosilylation of Ketones by Copper Ferrite Nanoparticles

Synfacts, 2009

Synthesis of Propargylamines Catalyzed by Nanocrystalline Copper(II) Oxide

Synfacts, 2008

1,4-Addition of Indoles to Enones Catalyzed by Nanocrystalline TiO 2

Synfacts, 2006

An Efficient Copper−Aluminum Hydrotalcite Catalyst for Asymmetric Hydrosilylation of Ketones at Room Temperature

Organic Letters, 2008

The Supporting Information contained errors in the optical rotation, concentration, 1 H NMR chemi... more

Download

Expanded graphite as an electrode material for an alcohol fuel cell

Journal of Power Sources, 2004

An efficient graphite electrode has been developed using expanded graphite as the starting materi... more An efficient graphite electrode has been developed using expanded graphite as the starting material. A graphite plate has been expanded by doping with potassium vapour using a vapour incorporation technique developed at our laboratory. The extent of expansion of the electrode plate is about 20% of its initial thickness. These expanded graphite electrodes have been platinized by an electrodeposition method. The electrocatalytic activity of platinized expanded graphite has been examined, and the discharge profile of a conventional laboratory model fuel cell comprising a platinized Pt air cathode, expanded platinized graphite anode and sulphuric acid (2 M) as electrolyte has been measured. Analysis of the electrochemical parameters of the laboratory model cell clearly indicates that the expanded Pt graphite electrode shows better electrochemical behaviour towards methanol (1 M), ethanol (1 M) and propanol (1 M) oxidation than that of unexpanded graphite electrodes. The results are explained in terms of efficient electrocatalytic activity of the nano channel formed after the expansion. These electrodes are expected to have promising applications in fuel cells.

Download

Pd/Mg–La mixed oxide catalyzed oxidative sp2 CH bond acylation with alcohols

Journal of Molecular Catalysis A: Chemical, 2013

ABSTRACT

Nanocrystalline Titanium(IV) Oxide as an Efficient Heterogeneous Catalyst for Tandem Michael and Nucleophilic 1,2‐Addition to Enones

Advanced Synthesis & Catalysis, 2006

Nanocrystalline titanium(IV) oxide was found to be an efficient heterogeneous catalyst for the co... more Nanocrystalline titanium(IV) oxide was found to be an efficient heterogeneous catalyst for the conjugate 1,4‐addition of indoles with α,β‐unsaturated ketones to afford β‐indolyl ketones in excellent yields. The subsequent catalytic 1,2‐addition of Me3SiCN to carbonyl compounds can be performed in one pot with moderate to good yields. Low sensitivity towards traces of moisture and high tolerance of different functional groups make nanocrystalline titanium(IV) oxide suitable for carrying out multistep synthetic sequences.

Download

Nanocrystalline copper(II) oxide catalyzed aza-Michael reaction and insertion of α-diazo compounds into N–H bonds of amines

Tetrahedron Letters, Aug 1, 2009

... Nanocrystalline copper(II) oxide catalyzed aza-Michael reaction and insertion of α-diazo comp... more

Synthesis of Propargylamines by Three-Component Coupling of Aldehydes, Amines and Alkynes Catalyzed by Magnetically Separable Copper Ferrite Nanoparticles

Synlett, Jun 12, 2009

... 14d Kantam ML, Laha S, Yadav J, Choudary BM, Sreedhar B,Adv. Synth. Catal. 2006, 348: 867. 14... more

Correction: A multi-component reaction for the synthesis of pyrido [1,2-b] isoquinoline derivatives via the [3 + 2] cycloaddition reaction between alkynes and in situ generated isoquinolinium ylides

Organic and Biomolecular Chemistry, 2020

Correction: A multi-component reaction for the synthesis of pyrido [1,2-b] isoquinoline derivativ... more

Download

Friedel—Crafts Alkylation of Indoles with Epoxides Catalyzed by Nanocrystalline Titanium(IV) Oxide

ChemInform, Dec 5, 2006

Friedel-Crafts alkylation of indoles with epoxides to afford 3-alkyl indole derivatives at room t... more

Download

Synthesis of Propargylamines with Copper Ferrite Nanoparticles

Synfacts, Sep 22, 2009

Download

Asymmetric Hydrosilylation of Ketones by Copper Ferrite Nanoparticles

Synfacts, Aug 21, 2009

Copper‐Impregnated Magnesium‐Lanthanum Mixed Oxide: A Reusable Heterogeneous Catalyst for Allylation of Aldehydes and Ketones

Advanced Synthesis & Catalysis, Jan 30, 2020

Download

Asymmetric Hydrosilylation of Prochiral Ketones Catalyzed by Nanocrystalline Copper(II) Oxide

Advanced Synthesis & Catalysis, Jul 2, 2007

Asymmetric hydrosilylation of aryl alkyl ketones to afford chiral secondary alcohols with good yi... more

Download

Pd‐Catalyzed One‐Pot Sequential Sonogashira Coupling and Dual Annulations Cascade for the Synthesis of Benzofuro[3,2‐c]‐Triazalo/Pyrrolo‐Quinolines

Advanced Synthesis & Catalysis

Correction: A multi-component reaction for the synthesis of pyrido [1,2-b] isoquinoline derivatives via the [3 + 2] cycloaddition reaction between alkynes and in situ generated isoquinolinium ylides

Organic & Biomolecular Chemistry, 2020

Download

Copper‐Impregnated Magnesium‐Lanthanum Mixed Oxide: A Reusable Heterogeneous Catalyst for Allylation of Aldehydes and Ketones

Advanced Synthesis & Catalysis, 2020

Download

A multi-component reaction for the synthesis of pyrido [1,2-b] isoquinoline derivatives via the [3 + 2] cycloaddition reaction between alkynes and in situ generated isoquinolinium ylides

Organic & Biomolecular Chemistry, 2019

Metal-free unprecedented [3 + 2] cycloaddition of alkynes and isoquinolinium ylide generated in s... more

Nano Copper(0)-Stabilized on Alumina: Efficient and Recyclable Heterogeneous Catalyst for Chemoselective Synthesis of 1,2-Disubstituted Benzimidazoles and Quinoxalines in Aqueous Medium

Catalysis Letters, 2017

ranges of substituted o-phenylenediamines and aldehydes or α-bromo ketones were used to achieve t... more

Download

Asymmetric Hydrosilylation of Ketones by Copper Ferrite Nanoparticles

Synfacts, 2009

Synthesis of Propargylamines Catalyzed by Nanocrystalline Copper(II) Oxide

Synfacts, 2008

1,4-Addition of Indoles to Enones Catalyzed by Nanocrystalline TiO 2

Synfacts, 2006