Hafnium Triflate as an Efficient Catalyst for Direct Friedel-Crafts Reactions of Chromene Hemiacetals

Rare Earth Metal and Hafnium Triflate-catalyzed Generation of Carbocation and Reaction with Various Nucleophiles

(2011) Masahiro Noji et al.   JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN

One-Pot Synthesis of Polyfunctionalized 4H-Chromenes and Dihydrocoumarins Based on Copper(II) Bromide-Catalyzed CC Coupling of Benzylic Alcohols with Ketene Dithioacetals

(2010) Deqiang Liang et al.   ADVANCED SYNTHESIS & CATALYSIS

One-Pot Hydroxy Group Activation/Carbon-Carbon Bond Forming Sequence Using a Brønsted Base/Brønsted Acid System

(2010) Alice Devineau et al.   ADVANCED SYNTHESIS & CATALYSIS

An Organocatalytic, δ-Regioselective, and Highly Enantioselective Nucleophilic Substitution of Cyclic Morita-Baylis-Hillman Alcohols with Indoles

(2010) Zhen Qiao et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Enantioselective Addition of Boronates to Chromene Acetals Catalyzed by a Chiral Brønsted Acid/Lewis Acid System

(2010) Philip N. Moquist et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Calcium-Catalyzed Friedel-Crafts Alkylation at Room Temperature

(2010) Meike Niggemann et al.   ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

A highly adaptable catalyst/substrate system for the synthesis of substituted chromenes

(2010) Aaron Aponick et al.   CHEMICAL COMMUNICATIONS

Asymmetric Synthesis of 4-Amino-4H-Chromenes by Organocatalytic Oxa-Michael/Aza-Baylis-Hillman Tandem Reactions

(2010) José Alemán et al.   CHEMISTRY-A EUROPEAN JOURNAL

Hf(OTf)4-Catalyzed RegioselectiveN-Aminomethylation of Indoles and Related NH-Containing Heterocycles

(2010) Norio Sakai et al.   JOURNAL OF ORGANIC CHEMISTRY

Boronic Acid Catalyzed Friedel−Crafts Reactions of Allylic Alcohols with Electron-Rich Arenes and Heteroarenes.

(2010) J. Adam McCubbin et al.   JOURNAL OF ORGANIC CHEMISTRY

Enantioselective Synthesis of Iclaprim Enantiomers―A Versatile Approach to 2-Substituted Chiral Chromenes

(2010) Chouaib Tahtaoui et al.   JOURNAL OF ORGANIC CHEMISTRY

Organocatalytic Asymmetric Tandem Michael Addition−Hemiacetalization: A Route to Chiral Dihydrocoumarins, Chromanes, and 4H-Chromenes

(2010) Dengfu Lu et al.   JOURNAL OF ORGANIC CHEMISTRY

Nickel-Catalyzed Stereoselective Glycosylation with C(2)-N-Substituted Benzylidened-Glucosamine and Galactosamine Trichloroacetimidates for the Formation of 1,2-cis-2-Amino Glycosides. Applications to the Synthesis of Heparin Disaccharides, GPI Anchor Pseudodisaccharides, and α-GalNAc

(2010) Enoch A. Mensah et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

A sensitive and highly selective fluorescent sensor for In3+

(2010) Yan-Chao Wu et al.   ORGANIC & BIOMOLECULAR CHEMISTRY

“One-Pot” Access to 4H-Chromenes with Formation of a Chiral Quaternary Stereogenic Center by a Highly Enantioselective Iminium-allenamine Involved Oxa-Michael−Aldol Cascade

(2010) Chunliang Liu et al.   ORGANIC LETTERS

Ligand-Free Silver(I)-Catalyzed Intramolecular Friedel-Crafts Alkylation of Arenes with Allylic Alcohols

(2009) Marco Bandini et al.   ADVANCED SYNTHESIS & CATALYSIS

Efficient Method for the Synthesis of Optically Active 2-Amino-2-chromene Derivatives via One-Pot Tandem Reactions

(2009) Jian-Wu Xie et al.   ADVANCED SYNTHESIS & CATALYSIS

Synthetic Studies on (−)-Lemonomycin: An Efficient Asymmetric Synthesis of Lemonomycinone Amide

(2009) Yan-Chao Wu et al.   JOURNAL OF ORGANIC CHEMISTRY

Synthesis of Highly Functionalized Bis(4H-chromene) and 4H-Benzo[g]chromene Derivatives via an Isocyanide-Based Pseudo-Five-Component Reaction

(2009) Ahmad Shaabani et al.   JOURNAL OF ORGANIC CHEMISTRY

Reactivity of Allenylphosphonates toward Salicylaldehydes and Activated Phenols: Facile Synthesis of Chromenes and Substituted Butadienes

(2009) N. N. Bhuvan Kumar et al.   JOURNAL OF ORGANIC CHEMISTRY

The Au(I)-Catalyzed Intramolecular Hydroarylation of Terminal Alkynes Under Mild Conditions: Application to the Synthesis of 2H-Chromenes, Coumarins, Benzofurans, and Dihydroquinolines

(2009) Rajeev S. Menon et al.   JOURNAL OF ORGANIC CHEMISTRY

Asymmetric Total Syntheses of (−)-Renieramycin M and G and (−)-Jorumycin Using Aziridine as a Lynchpin

(2009) Yan-Chao Wu et al.   ORGANIC LETTERS

Ytterbium(III) Triflate Catalyzed Tandem Friedel−Crafts Alkylation/Hydroarylation of Propargylic Alcohols with Phenols as an Expedient Route to Indenols

(2009) Xiaoxiang Zhang et al.   ORGANIC LETTERS

Practical Synthesis of Natural Amino Acid Derivatives: Hf(OTf)4-Catalyzed Mannich-Type Reaction of Ketene Silyl Acetals or Enol Silyl Ethers with N,O-Acetals as a Glycine Cation Equivalent

(2009) Norio Sakai et al.   SYNLETT

Efficient synthesis of indenes by FeCl3·6H2O-catalyzed intramolecular Friedel–Crafts reaction of aryl-substituted allylic alcohols

(2009) Jialiang Wang et al.   TETRAHEDRON LETTERS

Highly Efficient Molybdenum(II)-Catalyzed Intramolecular Allylic Alkylation of Arenes

(2008) Marco Bandini et al.   ADVANCED SYNTHESIS & CATALYSIS

A Novel Enantioselective Catalytic Tandem Oxa-Michael-Henry Reaction: One-Pot Organocatalytic Asymmetric Synthesis of 3-Nitro-2H-chromenes

(2008) Dan-Qian Xu et al.   ADVANCED SYNTHESIS & CATALYSIS

Catalysis of Salicylaldehydes and Two DifferentCHAcids with Electricity: First Example of an Efficient Multicomponent Approach to the Design of Functionalized Medicinally Privileged 2-Amino-4H-Chromene Scaffold

(2008) Michail N. Elinson et al.   ADVANCED SYNTHESIS & CATALYSIS

Facile construction of functionalized 4H-chromene via tandem benzylation and cyclization

(2008) Jinmin Fan et al.   CHEMICAL COMMUNICATIONS

Hafnium Trifluoromethanesulfonate (Hafnium Triflate) as a Highly Efficient Catalyst for Chemoselective Thioacetalization and Transthioacetalization of Carbonyl Compounds

(2008) Yan-Chao Wu et al.   JOURNAL OF ORGANIC CHEMISTRY

The Condensation of Salicylaldehydes and Malononitrile Revisited:  Synthesis of New Dimeric Chromene Derivatives

(2008) Marta Costa et al.   JOURNAL OF ORGANIC CHEMISTRY

Efficient Synthesis of 3-Iodoindenes via Lewis-Acid Catalyzed Friedel−Crafts Cyclization of Iodinated Allylic Alcohols

(2008) Xiaobo Zhou et al.   JOURNAL OF ORGANIC CHEMISTRY

Asymmetric Total Synthesis of (−)-Quinocarcin

(2008) Yan-Chao Wu et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Gold-catalysed allylic alkylation of aromatic and heteroaromatic compounds with allylic alcohols

(2008) Weidong Rao et al.   ORGANIC & BIOMOLECULAR CHEMISTRY

A facile Zr-mediated multicomponent approach to arylated allylic alcohols and its application to the synthesis of highly substituted indenes and spiroindenes

(2008) Shenghai Guo et al.   ORGANIC & BIOMOLECULAR CHEMISTRY

Ir-Catalyzed Regio- and Enantioselective Friedel–Crafts-Type Allylic Alkylation of Indoles

(2008) Wen-Bo Liu et al.   ORGANIC LETTERS

A practical approach to non-natural or N-unsubstituted α-arylglycine derivatives: Hf(OTf)4-doped Me3SiCl system-catalyzed aminomethylation of electron-rich arenes with a new type of N,O-acetal

(2008) Norio Sakai et al.   TETRAHEDRON