OOIR: Observatory of International Research

Papers

(The TQCC of Organic Preparations and Procedures International is 3. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2020-04-01 to 2024-04-01.)

Article	Citations
Greener Synthesis of 3,4-Disubstituted Isoxazole-5(4H)-ones in a Deep Eutectic Solvent	24
Nanostructural Cu-Doped ZnO Hollow Spheres as an Economical and Recyclable Catalyst in the Synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones and Pyrazolo[1,2-a][1,2,4]triazol	19
Dendrimer-Functionalized Magnetic Graphene Oxide for Knoevenagel Condensation	18
Magnetic Fe₃O₄@SiO₂ Core–Shell Nanoparticles Functionalized with Sulfamic Acid Polyamidoamine (PAMAM) Dendrimer for the Multicomponent Synthesis of Polyhydroquinolines	17
Ring Opening Reactions of Epoxides. A Review	15
Sulfated Polyborate Catalyzed Selective Friedlander Annulation for Synthesis of Highly Functionalized Quinolines	14
A Concise and Efficient Synthesis of Novel Alkylated 2-(2-hydroxyphenyl)-4,5-diphenylimidazole-based Ionic Liquids Using the MAOS Technique	14
Facile Protocol for the Synthesis of 2-Amino-4H-Chromene Derivatives using Choline Chloride/Urea	13
Green Synthesis of Copper Oxide Nanoparticles with an Extract of Euphorbia maculata and Their Use in the Biginelli Reaction	13
Facile and Efficient Synthesis of Bicyclic ortho-Aminocarbonitrile Derivatives Using Nanostructured Diphosphate Na₂CaP₂O₇	13
Glycine as a Green Catalyst for the Preparation of Xanthenes	11
Design of 2-Carboxy-1-sulfopyridin-1-ium Chloride as an Efficient and Eco-friendly Catalyst for the One-pot Synthesis of Highly Functionalized Tetrahydropyridines	11
Eco-friendly Preparations of Heterocycles Using Fruit Juices as Catalysts: A Review	11
Catalyst-free Synthesis of Pyrano[2,3-d]pyrimidine Scaffolds via Knoevenagel-Michael Cyclocondensation Using PEG-400 as a Green Promoting Medium	9
Caffeine as a Naturally Green and Biodegradable Catalyst for Preparation of Dihydropyrano[2,3-c]pyrazoles	9
Expeditious and Highly Efficient One-Pot Synthesis of Functionalized Imidazoles Catalyzed by Sulfated Polyborate	9
Three-Component Synthesis of 1,4-Disubstituted 1,2,3-Triazoles using a Novel and Efficient Nano Alumina Based Cu(II) Catalyst	9
Biowaste-Derived Heterogeneous Catalyst for the One-Pot Multicomponent Synthesis of Diverse and Densely Functionalized 2-Amino-4H-Chromenes	8
An Efficient Synthesis of Substituted Imidazoles Catalyzed by 3-N-Morpholinopropanesulfonic Acid (MOPS) under Ultrasound Irradiation	8
A Highly Effectual and Rapid Protocol for the Synthesis of 5-Amino-1,3-diaryl-1H-pyrazole-4-carbonitriles Using 1,3-Disulfonic Acid Imidazolium Trifluoroacetate as a Dual-Functional Catalyst	8
A New Multicomponent Reaction for the Synthesis of Amides	8
Friedländer Synthesis of Novel Polycyclic Quinolines Using Solid SiO₂/H₂SO₄ Catalyst	8
Synthesis of 3-Substituted Indoles Using Deep Eutectic Solvent and Ultrasound	8
Green Methods for the Synthesis of Pyrazoles: A Review	8
Recent Trends in the Chemistry of [1,2,4]Triazole[1,5-a]pyrimidines	7

Ultrasound Promoted Green Synthesis of Spiro Indoline-3,4′-pyrano[2,3-c]pyrazoles	7
Preparation of Novel Chiral α-Diazocarbonyl Compounds Using Regitz’s Methodology	7
Green Approach for Metal-free One-pot Synthesis of Tetrahydrobenzo[b]pyrans with Sodium Alginate as a Reusable Bifunctional Biopolymeric Catalyst	7
Solvent- and Catalyst-Free Synthesis of 6H-Chromeno [4,3-b]quinolin-6-ones	7
Synthesis and Antibacterial Activity of Novel 1,3-Oxazine Derivatives	7
Silica Sulfuric Acid/Ethylene Glycol: An Efficient Eco-Friendly Catalyst for One-Pot Synthesis of New Benzo[4,5]imidazo[1,2-a]pyrimidines	7
Application of [PVP-SO₃H] HSO₄ as an Efficient Polymeric-Based Solid Acid Catalyst in the Synthesis of Some Benzimidazole Derivatives	7
Ultrasound-Promoted One-Pot Three-Component Synthesis of β–Amino Carbonyl Compounds Using Manganese Perchlorate	7
Solvent-free, Efficient Transamidation of Carboxamides with Amines Catalyzed by Recyclable Sulfated Polyborate Catalyst	6
A Brief Review on the Synthesis of Pyrrolo[2,3-c]coumarins, including Lamellarin and Ningalin Scaffolds	6
Solvent-free Synthesis of Pyrano[2,3-d]pyrimidine Scaffolds Using per-6-NH₂-β-CD as a Reusable Supramolecular Host	6
A New Approach to the Total Synthesis of 20-Deethyltubifolidine and an Entry to the Azocino[4,3-b]indoles	6
An Efficient Synthesis of Novel Imidazo-Aminopyridinyl Derivatives from 2-Chloro-4-cyanopyridine	6
One-pot Synthesis of Pyranoquinoline Derivatives Using a New Nanomagnetic Catalyst Supported on Functionalized 4-Aminopyridine (AP) Silica	6
Solvent-free Synthesis of Halogenated Furo[2,3-d] pyrimidines and Their Cytotoxic Activity on the T47D Breast Cancer Cell Line	6
Natural Deep Eutectic Solvent as a Green Catalyst for the One-pot Synthesis of Chromene and 4H-Pyran Derivatives	5
Synthesis of Pyran Annulated Heterocyclic Compounds under Catalyst Free Conditions Using Aqueous Ethylene Glycol	5
Synthesis of Isoxazole-5(4 H )-ones Using Citrazinic Acid as an Organocatalyst in Aqueous Conditions	5
Current Advances in Transition Metal-Free Access to Indoles. A Review	5
Ionic-liquid Promoted Multi-component Preparation of Pyrazolo[3,4-d]thiazolo[3,2-a]pyrimidines under Solvent-free Conditions	5
Synthetic Applications of a New Magnetic Mesoporous Nanocomposite Catalyst Fe₃O₄@MCM-41@NH-SO₃H	5
Soluble Glass, an Efficient Promoter for the Cascade Addition-Cyclization Reaction of 4-Hydroxycoumarins to Chalcone Derivatives	5
Curcumin-Derived Heterocycles as Anticancer Agents. A Systematic Review.	5
One-Pot Expeditious Synthesis of 2-Amino-4,6-(disubstituted)nicotinonitriles Using Activated Fuller’s Earth as Catalyst	5
BTMA-Br₃ Promoted One Pot Synthesis of 1, 8-Dioxo-octahydroxanthenes under Eco-friendly Conditions	5
Emerging Approaches for Synthesis of 1,2,3-Triazole Derivatives. A Review	4
Ultrasound-Assisted Heterogeneous Oxidation of 1,4-Dihydropyridines	4
Tetrabutylammonium Iodide/I₂ Mediated Convenient and Green Synthesis of Substituted Organic Isothiocyanates	4
Preparation and Biological Activities of Novel Cuminaldehyde Derivatives	4
Chemoselective Benzylic Oxidation of Alkyl-Substituted Aromatics to Ketones with trans-3,5-Dihydroperoxy-3,5 Dimethyl-1,2-Dioxolane	4
Synthesis of Triazolothiones Using Nano-Fe₃O₄@SiO₂-SO₃H as a Heterogeneous Catalyst	4
Synthesis and Characterization of New Chalcone Derivatives of Aryl-Himachalene	4
A Convenient Synthesis of Rivaroxaban from (S)-Epichlorohydrin	4
An Improved Approach to the Synthesis of (±)-Noruleine	4
Cu(II)/Triazine-Based Dendrimer as an Efficacious Recoverable Nano-catalyst for the Preparation of 1-Substituted-1H-1,2,3,4-Tetrazoles under Solventless Conditions	3
An Improved Synthesis of Memantine Hydrochloride	3
An Improved Synthesis of Polyfunctional Acyl Azides in PEG 400	3
One-pot Synthesis of Benzimidazoles Using H₂SO₄@HTC as Catalyst	3
Nano-[Fe₃O₄@SiO₂-R-NHMe₂][H₂PO₄] as a Highly Effectual and Magnetically Recyclable Catalyst for the Preparation of bis(6-Amino-1,3-dim	3
An Efficient Regioselective Preparation of Fulvestrant	3
An Efficient One-Pot Synthesis of 2-Aryl-4,5-diphenyl-1H-imidazoles with Amberlite IR-120(H) as a Reusable Heterogeneous Catalyst	3
Development of 7-Aminopyrazolo[1,5-a]pyrimidines as Anti-Candida and Antibacterial Agents	3
Synthesis of Dihydropyrano[2,3-C]pyrazoles Using Mandelic Acid as an Efficient Catalyst	3
Catalytic Application of 1,4-Piperazinediethanesulfonic Acid (PIPES) for the One-pot Multicomponent Synthesis of Pyrano[4,3-b]pyrans	3
DABCO-catalyzed Five-component Domino Protocol for the Synthesis of Novel Benzo[a]pyrazolo[4’,3’:5,6]pyrano[2,3-c]phenazines in PEG-400 as an Efficient Green Reaction Medium	3
One-pot Preparation of Novel 1,4-Dihydropyridines in the Presence of SBA-15-SO₃H	3
Facile Construction of 1H-Pyrazolo[1,2-a]pyridazine-5,8-diones via Acid-promoted One-pot Three-component Reaction	3
Aluminized Polyborate: A New and Eco-friendly Catalyst for the Synthesis of SymmetricalN,N’-Di(aryl/alkyl)formamidines	3
Eco-Friendly and Efficient Greener Process for the Synthesis of Chalcones and Pyrazolones Using the Supramolecular Catalyst β-Cyclodextrin	3
The Use of MnCoFe₂O₄@GT@Cu Magnetic Nanoparticles in the Synthesis of Benzopyrans	3

Solar Energy Mediated Green Synthesis of Tetrahydrobenzo[b]pyrans Using L-Ascorbic Acid as an Organocatalyst in Aqueous Medium