Journal ArticleDOI
Transition metal catalysed synthesis of tetrahydro derivatives of [5]-, [6]- and [7]helicene
TLDR
In this article, a nonphotochemical methodology was proposed for enantioselective synthesis of a helical skeleton employing the Ni(cod) 2 /(S)-(−)-MOP catalytic system.About:
This article is published in Tetrahedron Letters.The article was published on 1999-03-05. It has received 130 citations till now. The article focuses on the topics: Cycloisomerization & Helicene.read more
Citations
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Recent Advances in the Transition-Metal-Catalyzed Regioselective Approaches to Polysubstituted Benzene Derivatives
TL;DR: A synthetic method for the synthesis of polysubstituted benzenes and, compared to the following transition metal-catalyzed methods, these approaches have some drawbacks from the viewpoint of atom economy or environmental concern.
Journal ArticleDOI
One hundred years of helicene chemistry. Part 1: non-stereoselective syntheses of carbohelicenes.
Marc Gingras,Marc Gingras +1 more
TL;DR: This first part of a series of three reviews on carbohelicenes will be devoted to a comprehensive report on non-stereoselective reactions and methods for producing helicenes, along with their functionalization.
Journal ArticleDOI
One hundred years of helicene chemistry. Part 2: stereoselective syntheses and chiral separations of carbohelicenes
TL;DR: This review gathered a substantial collection of data, and a comprehensive review on the preparations of enantioenriched helicenes, either from an asymmetric synthesis or from a chiral separation.
Journal ArticleDOI
Chiral monodentate phosphine ligand MOP for transition-metal-catalyzed asymmetric reactions.
TL;DR: Chiral monophosphines have been prepared from enantiomerically pure 2, 2'-dihydroxy-1,1'-binaphthyl and demonstrated to be highly efficient chiral ligands for transition-metal-catalyzed organic transformations, especially for reactions where chelating bisphosphine ligands cannot be used.
References
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Journal ArticleDOI
Improved methodology for photocyclization reactions
TL;DR: In this paper, a stoichiometric amount of iodide plus propylene oxide in the absence of air was shown to be superior to a catalytic amount of iodine in the air.
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Synthesis of optically active 2-(diarylphosphino)-1,1'-binaphthyls, efficient chiral monodentate phosphine ligands
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Some Observations On The Chemical, Photochemical, And Spectral Properties Of Thiophenes
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First enantioselective catalysis using a helical diphosphane
TL;DR: In this paper, the synthesis of 2,15-bis(diphenylphosphino)-hexahelicene (PHelix) in enantiomerically pure form and its use as a helical ligand for enantioselective rhodium-catalyzed hydrogenation are described.
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Synthesis of Helical Conjugated Ladder Polymers
Yujia Dai,Thomas J. Katz +1 more
TL;DR: The first helical ladder polymers with unbroken pathways of conjugation that extend not only through each monomeric unit, but between them as well are described in this paper, where the key step is the condensation of 1,2-phenylenediamine and a transition metal salt with a helicene having salicylaldehyde's functionality at both ends.