Book ChapterDOI
Thiopyrans and Their Benzo Derivatives
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The article was published on 2020-01-01. It has received 1 citations till now. The article focuses on the topics: Ring (chemistry) & Section (typography).read more
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Organocatalytic tandem Michael addition reactions: A powerful access to the enantioselective synthesis of functionalized chromenes, thiochromenes and 1,2-dihydroquinolines
TL;DR: This review addresses the most significant synthetic methods reported on chiral-amine-catalyzed tandem Michael conjugate addition of heteroatom-centered nucleophiles to α,β-unsaturated compounds followed by cyclization reactions for the enantioselective construction of functionalized chiral chromenes, thiochromenes and 1,2-dihydroquinolines in optically enriched forms found in a myriad of bioactive natural products and synthetic compounds.
Journal ArticleDOI
Chiral lithium(I) binaphtholate salts for the enantioselective direct Mannich-type reaction with a change of syn/anti and absolute stereochemistry.
TL;DR: Anti products were selectively obtained from acyclic ketoesters without epimerization at an alpha-tertiary-carbon center, and these are valuable since previous catalysts often gave syn/anti mixtures or the stereochemistry has not yet been determined.
Journal ArticleDOI
Asymmetric inverse-electron-demand hetero-Diels-Alder reaction of six-membered cyclic ketones: an enamine/metal Lewis acid bifunctional approach.
TL;DR: The first example of a highly chemoand enantioselective inverse-electron-demand hetero-Diels–Alder (HDA) reaction of cyclic ketones with b,g-unsaturated-a-ketoesters catalyzed by primary-amine-based enamine/metal Lewis acid bifunctional catalysts is reported.
Journal ArticleDOI
Novel Prolinamide‐Supported Polystyrene as Highly Stereoselective and Recyclable Organocatalyst for the Aldol Reaction
TL;DR: In this article, a prolinamide derivative anchored to a polystyrene support has been straightforwardly prepared and employed as heterogeneous catalyst in the direct asymmetric aldol reaction with good results in terms of yield and stereoselectivity.
Journal ArticleDOI
On the Mechanism of Ylide-Mediated Cyclopropanations: Evidence for a Proton-Transfer Step and Its Effect on Stereoselectivity
Samantha L. Riches,Chandreyee Saha,Noelia Fontán Filgueira,Emma Grange,Eoghan M. McGarrigle,Varinder K. Aggarwal +5 more
TL;DR: By applying this model to S-, N-, and P-ylides the authors have been able to rationalize the outcome of different ylide reactions bearing a variety of substituents in terms of chemo- and enantioselectivity.