G
Günter Helmchen
Researcher at Heidelberg University
Publications - 268
Citations - 11369
Günter Helmchen is an academic researcher from Heidelberg University. The author has contributed to research in topics: Enantioselective synthesis & Allylic rearrangement. The author has an hindex of 55, co-authored 267 publications receiving 10789 citations. Previous affiliations of Günter Helmchen include Aarhus University & University of Würzburg.
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PhosphinooxazolinesA New Class of Versatile, Modular P,N-Ligands for Asymmetric Catalysis
Günter Helmchen,Andreas Pfaltz +1 more
TL;DR: Chiral phosphinooxazolines (PHOX ligands) as discussed by the authors coordinate to a metal center with a N-and a P-atom, allowing effective enantiocontrol in a variety of metal-catalyzed reactions.
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Basic Principles of the CIP-System and Proposals for a Revision†
Vladlmir Prelog,Günter Helmchen +1 more
TL;DR: From Configurational Notation of Stereoisomers to the Conceptual Basis of Stereo Chemistry as mentioned in this paper is the title of a lecture [V. Prelog, ACS Symp. Ser. No. 12 (1975) 179] in which the chronologically and alphabetically third member of the CIP-triumvirate discusses the history of the system.
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Phosphinoaryl- and phosphinoalkyloxazolines as new chiral ligands for enantioselective catalysis: Very high enantioselectivity in palladium catalyzed allylic substitutions
Jürgen Sprinz,Günter Helmchen +1 more
TL;DR: Chiral phosphinoaryl-and phosphinoalkyloxazolines, a new class of chelate ligands, were prepared via convenient routes as mentioned in this paper, and Palladium complexes of the new ligands have proved to be highly effective catalysts for allylic substitution reactions.
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Iridium-Catalyzed Asymmetric Allylic Substitution Reactions
TL;DR: In this review, an explicit outline of ligands, mechanism, scope of nucleophiles, and applications is presented, including ligand development, mechanistic understanding, substrate scope, and application in the synthesis of complex functional molecules.
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Catalysis of allylic substitutions by Pd complexes of oxazolines containing an additional P, S, or Se Center. X-ray crystal structures and solution structures of chiral π-allyl palladium complexes of phosphinoaryloxazolines
Jürgen Sprinz,Matthias Kiefer,Günter Helmchen,Michael Reggelin,Gottfried Huttner,Olaf Walter,Laszlo Zsolnai +6 more
TL;DR: In this paper, allylic alkylations with Pd complexes of chiral oxazolines with an additional donor P, S, or Se center are reported, and the results conclusions concerning the steric course of allylic substitutions are drawn.