Engelbert Ciganek

2.3k total citations
53 papers, 1.4k citations indexed

About

Engelbert Ciganek is a scholar working on Organic Chemistry, Physical and Theoretical Chemistry and Pharmaceutical Science. According to data from OpenAlex, Engelbert Ciganek has authored 53 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 43 papers in Organic Chemistry, 10 papers in Physical and Theoretical Chemistry and 8 papers in Pharmaceutical Science. Recurrent topics in Engelbert Ciganek's work include Asymmetric Synthesis and Catalysis (13 papers), Inorganic and Organometallic Chemistry (8 papers) and Organic Chemistry Cycloaddition Reactions (8 papers). Engelbert Ciganek is often cited by papers focused on Asymmetric Synthesis and Catalysis (13 papers), Inorganic and Organometallic Chemistry (8 papers) and Organic Chemistry Cycloaddition Reactions (8 papers). Engelbert Ciganek collaborates with scholars based in United States. Engelbert Ciganek's co-authors include Arthur C. Cope, Joseph C. Calabrese, J M Read, Carl G. Krespan, William J. Linn, M. A. P. Meisinger, Norman A. Lebel, Ruta K. Bly, Bernard T. Gillis and Olof Ceder and has published in prestigious journals such as Journal of the American Chemical Society, Journal of Medicinal Chemistry and The Journal of Organic Chemistry.

In The Last Decade

Engelbert Ciganek

48 papers receiving 1.3k citations

Peers

Engelbert Ciganek

PTC

SPECT

Peter Schiess Switzerland

Jack K. Crandall United States

Karl R. Kopecky Canada

M. Mühlstädt Germany

James L. Fry United States

Michael P. Hartshorn New Zealand

Nguyên Trong Anh France

Dieter Scheutzow Germany

Christian Jutz Germany

J. Hudec United Kingdom

Peter Schiess Switzerland

Engelbert Ciganek

1.1k ×0.9

193 ×0.9

PTC

284 ×1.7

135 ×1.1

103 ×0.8

SPECT

Citations per year, relative to Engelbert Ciganek Engelbert Ciganek (= 1×) peers Peter Schiess

Countries citing papers authored by Engelbert Ciganek

Since Specialization

Citations

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

Fields of papers citing papers by Engelbert Ciganek

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Engelbert Ciganek

This figure shows the co-authorship network connecting the top 25 collaborators of Engelbert Ciganek. A scholar is included among the top collaborators of Engelbert Ciganek 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 Engelbert Ciganek. Engelbert Ciganek 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

Ciganek, Engelbert. (2009). ChemInform Abstract: Electrophilic Amination of Carbanions, Enolates, and Their Surrogates. ChemInform. 40(49). 1 indexed citations

Hodge, C. Nicholas, Paul E. Aldrich, Zelda R. Wasserman, et al.. (1999). Corticotropin-Releasing Hormone Receptor Antagonists: Framework Design and Synthesis Guided by Ligand Conformational Studies. Journal of Medicinal Chemistry. 42(5). 819–832. 60 indexed citations

Ciganek, Engelbert. (1997). 活性化オレフィンの触媒的α-ヒドロキシアルキル化およびα-アミノアルキル化(Morita-Baylis-Hillman反応). 51. 201–350. 6 indexed citations

Ciganek, Engelbert, J M Read, & Joseph C. Calabrese. (1995). Reverse Cope elimination reactions. 1. Mechanism and scope. The Journal of Organic Chemistry. 60(18). 5795–5802. 62 indexed citations

Ciganek, Engelbert. (1995). Reverse Cope elimination reactions. 2. Application to synthesis. The Journal of Organic Chemistry. 60(18). 5803–5807. 38 indexed citations

Ciganek, Engelbert. (1995). Esters of 2,3-Dihydro-3-oxobenzofuran-2-acetic Acid and 3,4-Dihydro-4-oxo-2H-1-benzopyran-3-acetic Acid by Intramolecular Stetter Reactions. Synthesis. 1995(10). 1311–1314. 77 indexed citations

Ciganek, Engelbert. (1992). Tertiary carbinamines by addition of organocerium reagents to nitriles and ketimines. The Journal of Organic Chemistry. 57(16). 4521–4527. 70 indexed citations

Ciganek, Engelbert. (1990). Reverse Cope eliminations. Pyrrolidine and piperidine N-oxides by intramolecular addition of N,N-disubstituted hydroxylamines to unactivated double bonds. The Journal of Organic Chemistry. 55(10). 3007–3009. 44 indexed citations

Shenvi, Ashok B. & Engelbert Ciganek. (1984). Convenient synthesis of 3-methyl-2,3,4,4a.alpha.,5,6,7,7a.alpha.-octahydro-1H-benzofuro[3,2-e]isoquinoline. The Journal of Organic Chemistry. 49(16). 2942–2947. 12 indexed citations

10.

Ciganek, Engelbert. (1971). Cycloheptatriene-norcaradiene system. III. Dependence of the ground-state enthalpy difference on substituents in the 7 position. Journal of the American Chemical Society. 93(9). 2207–2215. 68 indexed citations

11.

Ciganek, Engelbert. (1970). Negatively substituted acetylenes. III. Reverse Wittig reactions with triphenylphosphine oxide and triphenylarsine oxide. The Journal of Organic Chemistry. 35(6). 1725–1729. 19 indexed citations

12.

Ciganek, Engelbert. (1970). A ketenimine from the addition of a carbene to an isocyanide. The Journal of Organic Chemistry. 35(3). 862–862. 4 indexed citations

13.

Ciganek, Engelbert. (1969). The pyrolysis of keten-N--butylimines. Tetrahedron Letters. 10(59). 5179–5180. 5 indexed citations

14.

Ciganek, Engelbert. (1967). Diels-Alder additions of dicyanoacetylene to aromatic hydrocarbons. Tetrahedron Letters. 8(34). 3321–3325. 41 indexed citations

15.

Ciganek, Engelbert. (1967). The Cycloheptatriene-Norcaradiene System. I. 7,7-Dicyanonorcaradienes. Preparation and Structure Proof. Journal of the American Chemical Society. 89(6). 1454–1458. 75 indexed citations

16.

Ciganek, Engelbert. (1965). The Direct Observation of a Norcaradiene-Cycloheptatriene Equilibrium. Journal of the American Chemical Society. 87(5). 1149–1150. 55 indexed citations

17.

Cope, Arthur C., et al.. (1962). Amine Oxides. X. Thermal Decomposition of the N-Oxides and Methohydroxides of cis- and trans-N,N-Dimethyl-2-aminocyclohexanol and cis- and trans-N,N-Dimethyl-2-aminocycloöctanol. Journal of the American Chemical Society. 84(13). 2591–2596. 6 indexed citations

18.

Cope, Arthur C., Ruta K. Bly, Elizabeth P. Burrows, et al.. (1962). Fungichromin: Complete Structure and Absolute Configuration at C₂₆ and C₂₇. Journal of the American Chemical Society. 84(11). 2170–2178. 49 indexed citations

19.

Cope, Arthur C., et al.. (1959). ACID-CATALYZED EQUILIBRATIONS OF ENDOCYCLIC AND EXOCYCLIC OLEFINS. Journal of the American Chemical Society. 81(12). 3153–3154.

20.

Campbell, Neil & Engelbert Ciganek. (1956). 745. A new synthesis of 3-hydroxy-1 : 2-benzofluorene. Journal of the Chemical Society (Resumed). 3834–3834. 1 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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