Hans‐Georg Imrich

University of Hohenheim

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Uwe Beifuß

University of Hohenheim

Jürgen Conrad

University of Hohenheim

D. Bubrin

University of Stuttgart

Juergen Conrad

University of Hohenheim

Shaikh M. Mobin

Indian Institute of Technology Indore

Chandi C. Malakar

National Institute of Technology Manipur

Goutam Kumar Lahiri

Indian Institute of Technology Bombay

Stanislav Záliš

Czech Academy of Sciences, J. Heyrovský Institute of Physical Chemistry

Wolfgang Kaim

University of Stuttgart

Fadime Mert Balcı

Izmir Institute of Technology

Cooperative Institutions

University of Stuttgart

Indian Institute of Technology Bombay

Czech Academy of Sciences, J. Heyrovský Institute of Physical Chemistry

University of Hohenheim

Universidad Complutense de Madrid

Centre National de la Recherche Scientifique

Stuttgart Observatory

National Chemical Laboratory

Max Planck Society

University of Mumbai

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Influence of Guanidinium Salts and Other Ionic Liquids on the Three‐Component Aza‐DielsAlder Reaction

Helvetica Chimica Acta (2013)

Fadime Mert Balcı Hans‐Georg Imrich Jürgen Conrad Uwe Beifuß

Abstract The three‐component reaction of aniline, benzaldehyde, and dienophiles such as 2,3‐dihydrofuran, ethyl vinyl ether, 2,3‐dihydropyran, and cyclopentadiene can be promoted by ionic liquids like imidazolium salts and guanidinium salts under thermal as well as microwave conditions. The chemical yield as well as the diastereoselectivity of the Povarov reaction strongly depend on the ionic liquid employed. The guanidinium salts can be recycled and reused several times without loss of reactivity.

Dihydropyran

Reactivity

Benzaldehyde

Cyclopentadiene

10.1002/hlca.201200655

Cite

Citations (11)

From Nitrobenzenes to Substituted Tetrahydroquinolines in a Single Step by a Domino Reduction/Imine Formation/Aza-Diels–Alder Reaction

The Journal of Organic Chemistry (2015)

Hans‐Georg Imrich Jürgen Conrad D. Bubrin Uwe Beifuß

The three-component reaction between a nitrobenzene, an aldehyde, and a dienophile in the presence of iron powder as a reductant and montmorillonite K10 as a catalyst in aqueous citric acid delivers the products of an aza-Diels-Alder (Povarov) reaction with high endo-selectivity and yields up to 99%.

Imine

Nitrobenzene

Diels–Alder reaction

Domino

Anthranilic acid

10.1021/jo502882y

Cite

Citations (29)

ChemInform Abstract: Influence of Guanidinium Salts and Other Ionic Liquids on the Three‐Component Aza‐Diels—Alder Reaction.

ChemInform (2014)

Fadime Mert Balcı Hans‐Georg Imrich Juergen Conrad Uwe Beifuß

Abstract Three‐component reactions of aniline, benzaldehyde, and dienophiles can be promoted by ionic liquids like imidazolium salts and guanidinium salts under thermal as well as microwave conditions.

Component (thermodynamics)

Diels–Alder reaction

10.1002/chin.201409176

Cite

Citations (0)

ChemInform Abstract: Copper-Catalyzed Double Intramolecular Ullmann Coupling for the Synthesis of Diastereomerically and Enantiomerically Pure 4b,9b-Dihydrobenzofuro[3,2-b]benzofurans.

ChemInform (2016)

Hans‐Georg Imrich Juergen Conrad Uwe Beifuß

o-Arylation of syn-bis(bromoaryl)ethane diol furnishes dihydrobenzofurobenzofurans in diastereomerically pure form using established methods.

10.1002/chin.201616123

Cite

Citations (0)

CCDC 904466: Experimental Crystal Structure Determination

The Cambridge Structural Database (2013)

S. Roy Bibudhendra Sarkar Hans‐Georg Imrich J. Fiedler Stanislav Záliš

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/cczc5bt

Cite

Citations (0)

Cu(i)-catalyzed annulation for the synthesis of substituted naphthalenes using o-bromobenzaldehydes and β-ketoesters as substrates

Organic & Biomolecular Chemistry (2012)

Chandi C. Malakar Kavitha Sudheendran Hans‐Georg Imrich Sabine Mika Uwe Beifuß

Cu(I)-catalyzed reaction of o-bromobenzaldehydes with β-ketoesters using Cs(2)CO(3) as a base and 2-picolinic acid as an additive proceeds under mild conditions and gives access to substituted naphthalenes in a single step with yields ranging from 71 to 86%. The new annulation process relies on a domino Knoevenagel condensation/C-arylation/1,2-addition/carboxylic acid cleavage. The annulation can also be achieved with o-iodobenzaldehyde.

Annulation

10.1039/c2ob06963f

Cite

Citations (15)

ChemInform Abstract: From Nitrobenzenes to Substituted Tetrahydroquinolines in a Single Step by a Domino Reduction/Imine Formation/Aza‐Diels—Alder Reaction.

ChemInform (2015)

Hans‐Georg Imrich Juergen Conrad D. Bubrin Uwe Beifuß

Abstract Tetrahydro(cyclopenta)quinolines are synthesized by combining the reduction of nitroanilines with a Povarov reaction in a three‐component one‐pot approach.

Domino

Imine

Nitrobenzene

Diels–Alder reaction

10.1002/chin.201528209

Cite

Citations (0)

CCDC 1039459: Experimental Crystal Structure Determination

The Cambridge Structural Database (2015)

Hans‐Georg Imrich Jürgen Conrad D. Bubrin Uwe Beifuß

Crystal (programming language)

10.5517/cc13wmyk

Cite

Citations (0)

The First Domino Reduction/Imine Formation/Intramolecular Aza-Diels-Alder Reaction for the Diastereoselective Preparation of Tetrahydrochromano[4,3-b]quinolines

European Journal of Organic Chemistry (2016)

Hans‐Georg Imrich Jürgen Conrad Uwe Beifuß

The first domino reduction/imine formation/intramolecular aza‐Diels–Alder reaction is reported. Tetrahydrochromano[4,3‐ b ]quinolines are formed with high exo‐E‐anti selectivity and yields up to 87 % when a nitrobenzene and a 2‐(cinnamyloxy)benzaldehyde are reacted in aqueous citric acid by using iron as a reductant and montmorillonite K10 as a catalyst. The domino process starts with the in situ reduction of the nitrobenzene to the corresponding aniline, which is followed by imine formation and terminated by an intramolecular aza‐Diels–Alder reaction.

Imine

Domino

Diels–Alder reaction

10.1002/ejoc.201600976

Cite

Citations (11)

ChemInform Abstract: Cu(I)‐Catalyzed Annulation for the Synthesis of Substituted Naphthalenes Using o‐Bromobenzaldehydes and β‐Ketoesters as Substrates.

ChemInform (2012)

Chandi C. Malakar Kavitha Sudheendran Hans‐Georg Imrich Sabine Mika Uwe Beifuß

Abstract A simple, mild, and efficient one‐pot synthesis of the title compounds from easily accessible starting materials is developed.

Annulation

10.1002/chin.201237081

Cite

Citations (0)