Günter Helmchen

15.2k citations

198 papers · 12.5k indexed · 4 hit papers · h-index 58

Inorganic Chemistry top 0.1%
- Asymmetric Hydrogenation and Catalysis 69
Organic Chemistry top 0.05%
- Asymmetric Synthesis and Catalysis 101
- Synthetic Organic Chemistry Methods 58
- Advanced Synthetic Organic Chemistry 28
- Organometallic Complex Synthesis and Catalysis 16
Process Chemistry and Technology top 2%
Spectroscopy top 0.5%
- Analytical Chemistry and Chromatography 22
- Molecular spectroscopy and chirality 19
Pharmaceutical Science top 1%
Molecular Biology
- Chemical Synthesis and Analysis 31

Co-authors: Andreas Pfaltz Jian‐Ping Qu Henning Steinhagen Robert Weihofen Mathias Schelwies Pierre Dübon Björn Bartels Frank Röminger
Cited by: Inorganic Chemistry Organic Chemistry Process Chemistry and Technology
Journals: Tetrahedron Letters (24 papers)Chemistry - A European Journal (15 papers)European Journal of Organic Chemistry (12 papers)
Partner nations: Germany Switzerland United Kingdom

In The Last Decade

Günter Helmchen

197 papers receiving 12.1k citations

Hit Papers

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What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

2018 Chemical Reviews
2000 Accounts of Chemical Research
1993 Tetrahedron Letters
1982 Angewandte Chemie International Edition in English

Peers

Countries citing papers authored by Günter Helmchen

Since Specialization

Citations

This map shows the geographic impact of Günter Helmchen's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Günter Helmchen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Günter Helmchen more than expected).

Fields of papers citing papers by Günter Helmchen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Günter Helmchen. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Günter Helmchen. The network helps show where Günter Helmchen may publish in the future.

Co-authorship network

The 25 scholars most cited alongside Günter Helmchen, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Günter Helmchen Line = papers co-authored together Günter Helmchen links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Definition of the term asymmetric synthesis—History and revision Chirality ·Günter Helmchen	2023	8
2	Iridium-Catalyzed Asymmetric Allylic Substitution Reactionsbreakdown → Chemical Reviews ·Qiang Cheng,Hang‐Fei Tu,Chao Zheng,Jian‐Ping Qu,Günter Helmchen,Shu‐Li You	2018	662
3	Iridium‐Catalyzed Allylic Substitutions with Cyclometalated Phosphoramidite Complexes Bearing a Dibenzocyclooctatetraene Ligand: Preparation of (π‐Allyl)Ir Complexes and Computational and NMR Spectroscopic Studies Chemistry - A European Journal ·Jevgenij A. Raskatov,Jyoti Datta,Bernd F. Straub,Frank Röminger,Günter Helmchen	2012	30
4	Syntheses of the Hexahydroindene Cores of Indanomycin and Stawamycin by Combinations of Iridium‐Catalyzed Asymmetric Allylic Alkylations and Intramolecular Diels–Alder Reactions Chemistry - A European Journal ·Martin Gärtner,Gedu Satyanarayana,Anh T.,Günter Helmchen	2012	9
5	Differential effects of the brefeldin A analogue (6R)-hydroxy-BFA in tobacco and Arabidopsis Journal of Experimental Botany ·Markus Langhans,Anh T.,Günter Helmchen,David G. Robinson	2011	48
6	A Configurational Switch Based on Iridium‐Catalyzed Allylic Cyclization: Application in Asymmetric Total Syntheses of Prosopis, Dendrobate, and Spruce Alkaloids Chemistry - A European Journal ·Christian Gnamm,Kerstin Brödner,Caroline M. Krauter,Günter Helmchen	2009	54
7	Gold‐Catalyzed Intermolecular Addition of Carbonyl Compounds to 1,6‐Enynes: Reactivity, Scope, and Mechanistic Aspects Chemistry - A European Journal ·Mathias Schelwies,Ralph Moser,Adrian L. Dempwolff,Frank Röminger,Günter Helmchen	2009	40
8	Ir‐Catalyzed Asymmetric Allylic Substitutions with (Phosphoramidite)Ir Complexes—Resting States, Synthesis, and Characterization of Catalytically Active (π‐Allyl)Ir Complexes Chemistry - A European Journal ·Stephanie Spiess,Jevgenij A. Raskatov,Christian Gnamm,Kerstin Brödner,Günter Helmchen	2009	71
9	Iridium‐Catalyzed Asymmetric Allylic Substitutions—Very High Regioselectivity and Air Stability with a Catalyst Derived from Dibenzo[a,e]cyclooctatetraene and a Phosphoramidite Angewandte Chemie International Edition ·Stephanie Spiess,Carolin Welter,L E M Hannen,J. Taquet,Günter Helmchen	2008	108
10	Preparation of 2,4‐Disubstituted Cyclopentenones by Enantioselective Iridium‐Catalyzed Allylic Alkylation: Synthesis of 2′‐Methylcarbovir and TEI‐9826 Chemistry - A European Journal ·Pierre Dübon,Mathias Schelwies,Günter Helmchen	2008	43
11	Gold‐Catalyzed Intermolecular Addition of Carbonyl Compounds to 1,6‐Enynes Angewandte Chemie International Edition ·Mathias Schelwies,Adrian L. Dempwolff,Frank Röminger,Günter Helmchen	2007	88
12	Iridium-catalysed asymmetricallylic substitutions Chemical Communications ·Günter Helmchen,Axel Dahnz,Pierre Dübon,Mathias Schelwies,Robert Weihofen	2006	453
13	Salt‐Free Iridium‐Catalyzed Asymmetric Allylic Aminations with N,N‐Diacylamines and ortho‐Nosylamide as Ammonia Equivalents Angewandte Chemie International Edition ·Robert Weihofen,Olena Tverskoy,Günter Helmchen	2006	144
14	Enantioselective Modular Synthesis of 2,4‐Disubstituted Cyclopentenones by Iridium‐Catalyzed Allylic Alkylation Angewandte Chemie International Edition ·Mathias Schelwies,Pierre Dübon,Günter Helmchen	2006	60
15	Enantioselective synthesis of (+)(R)- and (–)(S)-nicotine based on Ir-catalysed allylic amination Organic & Biomolecular Chemistry ·Carolin Welter,Wei-Xu Cao,Stéphane Streiff,Günter Helmchen	2005	58
16	Preparation of chiral triarylphosphines by Pd-catalysed asymmetric P–C cross-coupling Chemical Communications ·Septi Ramyanti,Günter Helmchen	2004	85
17	A New Synthesis Route to Enantiomerically Pure Jasmonoids Angewandte Chemie International Edition ·Martin Ernst,Günter Helmchen	2002	35
18	(Phosphanyloxazoline)palladium Complexes, Part I: (η3-1,3-Dialkylallyl)(phosphanyloxazoline)palladium Complexes: X-Ray Crystallographic Studies, NMR Investigations, and Quantum-Chemical Calculations Chemistry - A European Journal ·Martin Kollmar,Bernd Goldfuß,Michael Reggelin,Frank Röminger,Günter Helmchen	2001	89
19	Enantioselective Allylic Substitution of Cyclic Substrates by Catalysis with Palladium Complexes of P,N-Chelate Ligands with a Cymantrene Unit Angewandte Chemie International Edition ·Aditya Lonkar,Günter Helmchen	1998	122
20	Synthesis of enantiomerically pure (S)-3-trichloromethylbutyric acid via asymmetric conjugate addition of trichloromethyl metal compounds to a chiral enoate. Activation effect of a sulfonylamino group Tetrahedron Letters ·Günter Helmchen,Arisbel Benitez-Morales	1985	24

About Günter Helmchen

Günter Helmchen is a scholar working on Organic Chemistry, Inorganic Chemistry and Spectroscopy, having authored 198 papers that have together received 12.5k indexed citations. Recurring topics across this work include Asymmetric Synthesis and Catalysis (101 papers), Asymmetric Hydrogenation and Catalysis (69 papers), Synthetic Organic Chemistry Methods (58 papers), Chemical Synthesis and Analysis (31 papers), Advanced Synthetic Organic Chemistry (28 papers), Analytical Chemistry and Chromatography (22 papers), Molecular spectroscopy and chirality (19 papers) and Organometallic Complex Synthesis and Catalysis (16 papers). The work is most often cited by research in Inorganic Chemistry (5.6k citations), Organic Chemistry (11.1k citations) and Process Chemistry and Technology (208 citations). Günter Helmchen has collaborated with scholars based in Germany, Switzerland and United Kingdom. Frequent co-authors include Andreas Pfaltz, Jian‐Ping Qu, Henning Steinhagen, Robert Weihofen, Mathias Schelwies, Pierre Dübon, Björn Bartels, Frank Röminger, Shu‐Li You and Axel Dahnz. Their work appears in journals such as Tetrahedron Letters, Chemistry - A European Journal, European Journal of Organic Chemistry, Synlett and Angewandte Chemie International Edition.

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