Asymmetric organocatalysis: an efficient enantioselective access to benzopyranes and chromenes.

  title={Asymmetric organocatalysis: an efficient enantioselective access to benzopyranes and chromenes.},
  author={Magnus Rueping and Erli Sugiono and Est{\'i}baliz Merino},
  volume={14 21},
New Role for Photoexcited Na2 Eosin Y via the Direct Hydrogen Atom Transfer Process in Photochemical Visible-Light-Induced Synthesis of 2-Amino-4H-Chromene Scaffolds Under Air Atmosphere
The Knoevenagel–Michael cyclocondensation of malononitrile, aryl aldehydes, and resorcinol was used as a multicomponent green tandem strategy for the metal-free synthesis of 2-amino-4H-chromene
One-pot multi-component synthesis of diverse bioactive heterocyclic scaffolds involving 6-aminouracil or its N-methyl derivatives as a versatile reagent
Abstract The present review summarizes all the multi-component reaction strategies reported during last two decades for the synthesis of diverse bioactive heterocyclic scaffolds involving
4-(Dimethylamino)pyridine as an Efficient Catalyst for One-Pot Synthesis of 1,4-Pyranonaphthoquinone Derivatives via Microwave-Assisted Sequential Three Component Reaction in Green Solvent
Novel 1,4-pyranonaphthoquinone derivatives were successfully synthesized via the microwave-assisted three-component reaction of 1,4-naphthoquinone, malononitrile, and various arylaldehydes in ethanol
Design of a Schiff Base Complex of Copper Coated on Epoxy-Modified Core–Shell MNPs as an Environmentally Friendly and Novel Catalyst for the One-Pot Synthesis of Various Chromene-Annulated Heterocycles
This method makes a novel and significant advancement in the synthesis of various chromene-annulated heterocycles through the one-pot three component reaction of aromatic aldehydes, various phenols, and malononitrile in ethanol at reflux conditions.
An Efficient One Pot Four-Component Synthesis of Spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] Derivatives via Electrochemical Approach
An efficient, simple and one pot, synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] derivative by electrochemically induced condensation of β-keto ester, hydrazine hydrate, malononitrile or
On the Enantioselective Phosphoric-Acid-Catalyzed Hantzsch Synthesis of Polyhydroquinolines.
A reinvestigation of a chiral phosphoric-acid-catalyzed four-component Hantzsch enantioselective synthesis of polyhydroquinolines reported in 2009 is presented and results are backed by baseline separation of the enantiomers by HPLC analyses on chiral stationary phase with UV and chiroptical detection.


One-Pot Synthesis of 2H-Pyrans by Indium(III) Chloride-Catalyzed Reactions.Efficient Synthesis of Pyranocoumarins, Pyranophenalenones, and Pyranoquinolinones
An efficient synthesis of 2H-pyrans is achieved by indium (III) chloride-catalyzed reactions of 1,3-dicarbonyl compounds with a variety of α,β-unsaturated aldehydes in moderate yields. This method
A Concise Route for the Synthesis of Pyranonaphthoquinone Derivatives
An efficient synthesis of pyranonaphthoquinones is achieved by ethylenediamine diacetate-catalyzed reactions of 4-hydroxy-2-quinolones with a variety of α,β-unsaturated aldehydes in moderate yields.
Diarylprolinolether: Erweiterung des Potenzials für die Enamin‐/Iminiumionkatalyse
Die asymmetrische Katalyse liefert den Chemikern neue wirkungsvolle Werkzeuge f r die effiziente Synthese komplexer Molek le. Viele Jahre lang war sie eng mit dem Einsatz von chiralen b vor kurzem
Asymmetrische organokatalytische Dominoreaktionen
Der derzeitige Stand der organischen Synthese macht oft kostspielige Schutzgruppenstrategien und aufwandige Reinigungsschritte nach jeder Synthesestufe erforderlich. Um diese Probleme zu umgehen,
A Lewis Acid-Catalyzed Formal [3 + 3] Cycloaddition of α,β-Unsaturated Aldehydes with 4-Hydroxy-2-Pyrone, Diketones, and Vinylogous Esters
A Lewis acid-catalyzed formal cycloaddition of α,β-unsaturated aldehydes with 6-methyl-4-hydroxy-2-pyrone, 1,3-diketones, and vinylogous silyl esters is described here.
The Domino Oxa‐Michael Addition–Aldol Reaction: Access to Variably Substituted Tetrahydroxanthenones
Tetrahydroxanthenones represent the core of many natural products, most of which exhibit interesting biological activities. In the course of our synthetic efforts towards the total synthesis of the
Brønsted Acid‐Catalyzed Synthesis of Pyrans via a Formal [3+3] Cycloaddition
Bronsted acids catalyze the addition of enolizable β-keto esters to α,β-unsaturated aldehydes leading to substituted 2H-pyrans in good yields under mild conditions via a formal [3+3] cycloaddition.