Leif Grehn

1.9k total citations
76 papers, 1.6k citations indexed

About

Leif Grehn is a scholar working on Molecular Biology, Organic Chemistry and Spectroscopy. According to data from OpenAlex, Leif Grehn has authored 76 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 57 papers in Molecular Biology, 50 papers in Organic Chemistry and 13 papers in Spectroscopy. Recurrent topics in Leif Grehn's work include Chemical Synthesis and Analysis (48 papers), Chemical Synthesis and Reactions (27 papers) and Sulfur-Based Synthesis Techniques (8 papers). Leif Grehn is often cited by papers focused on Chemical Synthesis and Analysis (48 papers), Chemical Synthesis and Reactions (27 papers) and Sulfur-Based Synthesis Techniques (8 papers). Leif Grehn collaborates with scholars based in Sweden, Portugal and Estonia. Leif Grehn's co-authors include Ulf Ragnarsson, Barthélemy Nyasse, Bengt Fransson, Fredrik Degerbeck, Kerstin Gunnarsson, Juta Koppel, Luı́s S. Monteiro, Hernâni L. S. Maia, Ilmar A. Koppel and Bengt Mannervik and has published in prestigious journals such as Accounts of Chemical Research, Biochemistry and Analytical Biochemistry.

In The Last Decade

Leif Grehn

76 papers receiving 1.5k citations

Peers

Leif Grehn

SPECT

Minoru Hatanaka Japan

Takehisa Kunieda Japan

Diane M. Coe United Kingdom

François Guibé France

Ahmed F. Abdel‐Magid United States

Shigeki Sano Japan

Rekha D. Shah United States

L. Thijs Netherlands

Hyun‐Joon Ha South Korea

Atsushi Abiko Japan

Minoru Hatanaka Japan

Leif Grehn

1.2k ×1.1

628 ×0.7

168 ×1.0

129 ×1.0

SPECT

82 ×0.8

Citations per year, relative to Leif Grehn Leif Grehn (= 1×) peers Minoru Hatanaka

Countries citing papers authored by Leif Grehn

Since Specialization

Citations

This map shows the geographic impact of Leif Grehn'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 Leif Grehn with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Leif Grehn more than expected).

Fields of papers citing papers by Leif Grehn

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Leif Grehn. 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 Leif Grehn. The network helps show where Leif Grehn may publish in the future.

Co-authorship network of co-authors of Leif Grehn

This figure shows the co-authorship network connecting the top 25 collaborators of Leif Grehn. A scholar is included among the top collaborators of Leif Grehn based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Leif Grehn. Leif Grehn is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Kurtovic, Sanela, Leif Grehn, Andreas Karlsson, Ulf Hellman, & Bengt Mannervik. (2008). Glutathione transferase activity with a novel substrate mimics the activation of the prodrug azathioprine. Analytical Biochemistry. 375(2). 339–344. 14 indexed citations

Grahn, E., Marián Novotný, Emma Jakobsson, et al.. (2006). New crystal structures of human glutathione transferase A1-1 shed light on glutathione binding and the conformation of the C-terminal helix. Acta Crystallographica Section D Biological Crystallography. 62(2). 197–207. 57 indexed citations

Ragnarsson, Ulf, et al.. (2005). Synthesis and utilization of 13C and 15N backbone-labeled proline: NMR study of synthesized oxytocin with backbone-labeled C-terminal tripeptide amide. Amino Acids. 29(2). 151–160. 6 indexed citations

Grehn, Leif & Ulf Ragnarsson. (2002). Reagent for Synthesis of Secondary Amines by Two Consecutive N-Alkylations and Its Application to Orthogonally Protected Spermidine. The Journal of Organic Chemistry. 67(18). 6557–6559. 6 indexed citations

Pettersson, Pär L., et al.. (2001). Role of the Glutamyl α-Carboxylate of the Substrate Glutathione in the Catalytic Mechanism of Human Glutathione Transferase A1-1. Biochemistry. 40(51). 15835–15845. 34 indexed citations

Malthouse, J. Paul G., et al.. (1997). Enzymatic synthesis of isotopically labelled serine and tryptophan for application in peptide synthesis. Journal of Peptide Science. 3(5). 361–366. 5 indexed citations

Grehn, Leif, Ulf Ragnarsson, & Christopher J. Welch. (1997). Carbon-Carbon and Carbon-Nitrogen Spin-Spin Coupling in NMR Spectroscopy: Simple Examples Based on Isotope-Labeled Glycines. Journal of Chemical Education. 74(12). 1477–1477. 2 indexed citations

Grehn, Leif, et al.. (1997). ChemInform Abstract: A Prototypical Reagent for the Synthesis of Substituted Hydrazines.. ChemInform. 28(9). 1 indexed citations

Mäeorg, Uno, Leif Grehn, & Ulf Ragnarsson. (1996). Prototypical Reagent for the Synthesis of Substituted Hydrazines. Angewandte Chemie International Edition in English. 35(22). 2626–2627. 29 indexed citations

10.

Koppel, Ilmar A., Juta Koppel, Ivo Leito, & Leif Grehn. (1996). Basicity of 3-aminopropionamidine derivatives in water and dimethyl sulphoxide. Implication for a pivotal step in the synthesis of distamycin A analogues. Journal of Physical Organic Chemistry. 9(5). 265–268. 7 indexed citations

11.

Degerbeck, Fredrik, Bengt Fransson, Leif Grehn, et al.. (1995). Synthesis of 15N-Labelled Leu-Enkephalins.. Acta chemica Scandinavica/Acta chemica Scandinavica. B, Organic chemistry and biochemistry/Acta chemica Scandinavica. A, Physical and inorganic chemistry/Acta chemica Scandinavica. Series B. Organic chemistry and biochemistry/Acta chemica Scandinavica. Series A, Physical and inorganic chemistry. 49(2). 149–151. 4 indexed citations

12.

Ding, Lu, Leif Grehn, Erik De Clercq, et al.. (1994). Synthesis and Antiviral Activity of Three Pyrazole Analogues of Distamycin A.. Acta chemica Scandinavica/Acta chemica Scandinavica. B, Organic chemistry and biochemistry/Acta chemica Scandinavica. A, Physical and inorganic chemistry/Acta chemica Scandinavica. Series B. Organic chemistry and biochemistry/Acta chemica Scandinavica. Series A, Physical and inorganic chemistry. 48(6). 498–505. 26 indexed citations

13.

Tomkinson, Birgitta, Leif Grehn, Bengt Fransson, & Örjan Zetterqvist. (1994). Use of a Dehydroalanine-Containing Peptide as an Efficient Inhibitor of Tripeptidyl Peptidase II. Archives of Biochemistry and Biophysics. 314(2). 276–279. 13 indexed citations

14.

Koppel, Ilmar A., Juta Koppel, Fredrik Degerbeck, Leif Grehn, & Ulf Ragnarsson. (1991). Acidity of imidodicarbonates and tosylcarbamates in dimethyl sulfoxide. Correlation with yields in the Mitsunobu reaction. The Journal of Organic Chemistry. 56(25). 7172–7174. 74 indexed citations

15.

Fransson, Bengt, et al.. (1990). Separation of spermidine derivatives by reversed-phase high-performance liquid chromatography using a UV-absorbing counter ion. Journal of Chromatography A. 508(1). 229–231. 4 indexed citations

16.

Fransson, Bengt, Leif Grehn, & Ulf Ragnarsson. (1989). Liquid chromatographic separation of acidic phosphoserine peptides on macroporous copoly(styrene-divinyl-benzene) using amines to regulate retention. Journal of Chromatography A. 473. 63–69. 1 indexed citations

17.

Grehn, Leif, et al.. (1988). Selective protection of polyamines: synthesis of model compounds and spermidine derivatives. Journal of the Chemical Society Perkin Transactions 1. 1905–1905. 26 indexed citations

18.

Grehn, Leif, Bengt Fransson, & Ulf Ragnarsson. (1987). Synthesis of substrates of cyclic AMP-dependent protein kinase and use of their protected precursors for the convenient preparation of phosphoserine peptides. Journal of the Chemical Society Perkin Transactions 1. 529–529. 14 indexed citations

19.

Fransson, Bengt, Leif Grehn, & Ulf Ragnarsson. (1983). High-performance liquid chromatography of distamycin A and its primary decomposition products as well as some synthetic analogues. Journal of Chromatography A. 268. 347–351. 1 indexed citations

20.

Grehn, Leif. (1977). Mass spectra of ortho substituted 1‐phenyl‐2‐thioureas. Organic Mass Spectrometry. 12(5). 267–268. 4 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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