OOIR: Observatory of International Research

Papers

(The median citation count of Organic Preparations and Procedures International is 1. 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 2022-05-01 to 2026-05-01.)

Article	Citations
Copper (II)-immobilized on Starch-coated Nanomagnetite as an Efficient and Magnetically Recoverable Catalyst for the Synthesis of Propargylamines through One-pot A³ Coupling Reaction	32
Synthesis of 2,3-Dihydroquinazolinones via Condensation of 2-Aminobenzamides with Aldehydes under Ball Milling Conditions	28
Current Advances in Transition Metal-Free Access to Indoles. A Review	21
H ₆ P ₂ W ₁₈ O ₆₂ ·18H ₂	19
Facile Synthesis of Spirocyclic Oxindole Scaffolds via Intermolecular [4 + 1] Cycloaddition of ortho -Quinone Methides with 3-Chlorooxindoles	13
An Improved and Practical Synthesis of Vonoprazan	12
Catalytic Evaluation of Surface Engineered Activated Carbon with SnO ₂ Nanoparticles for Synthesis of Dihydropyrimidinones at Room Temperature	12
An Improved Method for Alcoholysis of Amides and Acid Hydrazides by Secondary Alcohols in the Presence of Triflic Acid	10
Microwave-Assisted Iodotrimethylsilane-Promoted Synthesis of Novel Pyrazolyl Chalcones	10
Design, Synthesis, and Insecticidal Activity of Novel Fipronil Derivatives Incorporating a Sulfide Unit	10
Design and One-pot Synthesis of Novel Carbazole-based Thiazolone Imines	9
New Approach for the Synthesis and Purification of Spiro[fluorene-9,5’-[1,3]-dioxan]-2’-one	9
Rapid Synthesis of 3-Hydroxyflavones from 2’-Hydroxyacetophenones and Benzaldehydes	9
New Coumarin Derivatives as Cytotoxic Agents: Synthesis, in silico DNA-Binding Studies and MTT Assays in the MCF-7 Cell Line	8
New and Practical Synthesis of N -(Pyrimidin-5-ylmethyl)pyridin-2-amine, the Key Intermediate to Triflumezopyrim	8
Magnetic Nanoparticle Supported Lewis Acidic Deep Eutectic Solvent (LADES@MNP) for the One-pot Synthesis of 14-Aryl-14- H -dibenzo[a,j]xanthenes	7
Development of an Efficient Alternative Synthesis of the Endothelin Receptor Antagonist Bosentan	7
An Original Transposition of the 4-Fluorobenzylamino Group from 1-(4-Fluorobenzylamino)-1-methylsulfanyl-2-nitroethylene in Triflic Acid^†	7
Efficient Synthesis of trans-3-Amino-1-methylcyclobutan-1-ol	7
Ultrasonic Assisted Mono-iodination of Activated Aromatics Using Iodine and Iodic Acid	6
Reinvestigating the Preparation of Glyoxime and Its Chlorination by a Slight Overpressure of Chlorine Gas to Prepare Dichloroglyoxime	6
Synthesis of Novel 1,4-Disubstituted Piperazines and Evaluation of Their Antibacterial Activities	6
Synthesis of 5-Methoxy-2-acetyl-1-naphthol	6
An Efficient and Practical Synthesis of Oseltamivir Phosphate	6
Recent Advances in 2-Aminobenzothiazole Chemistry: Catalysis in the Preparation of 1-(Benzothiazolylamino)methyl-2-naphthols. A Brief Review	5

Eco-Friendly Access to 2,4,5-Trisubstituted Imidazoles using (Cu ₂ O)Cu@C-NPs as a Nanoparticulate Heterogeneous Catalyst	5
Synthesis of Novel Substituted Guanidines and Pyrimidines Using Pyridinium and Methanaminium Salts in Water as a Green Solvent	5
Synthesis of Dihydropyrano[2,3- c ]pyrazoles with Trifluoroethanol as a Reusable Promoting Medium: A Green Protocol	5
Comparison of the Accelerating Effects of Two Ionic Liquids in the Oxidation of Alcohols	5
An Organocatalytic Biogenic Approach for the Synthesis of Coumarins Using the Pechmann Condensation Reaction	5
A Rapid and Environmentally Benign Access to Hantzsch’s Polyhydroquinolines	5
A Novel and Rapid Method to Prepare Aminothiazoles	5
Oxidative Cleavage of C=N Bond of Ketoximes with Singlet Molecular Oxygen Generated from trans- 5-Hydroperoxy-3,5-dimethyl-1,2-dioxolane-3-yl Ethaneperoxoate	5
Contemporary Developments in the Transition-Metal Catalyzed Synthesis of Indoles. A Review	5
Manganese (II) Chloride Tetrahydrate as an Efficient Catalyst for the Preparation of 5-Aryl-1 H -tetrazoles via	5
Synthesis of Tetrahydrobenzo[b]pyrans Promoted by Sodium Stearate as a Lewis Base-Surfactant Combined Catalyst in an Aqueous Micellar Medium	5
Melamine, a Recyclable Catalyst for the Synthesis of Dihydropyrano[2,3-c]pyrazoles in Aqueous Ethanol	5
Highly Stereoselective and Scalable Synthesis of Eldecalcitol	5
Recent Synthetic Applications of Hypervalent Iodine Reagents. A Review in Three Installments: Installment I	5
CAN Combined with NaI as Promoter System for the Synthesis of Novel Ethyl 1,2-Diarylpyrrolidine-3-carboxylate Derivatives via Three-Component Reaction	4
An Efficient Synthesis Process for 3,4-Dichloronitrobenzene Using the Solid Acid Catalyst SZT-0.15	4
Greener Synthesis of Novel Azo-linked 1,2,4-Triazolidine-3-ones (thiones) Using Recyclable Fe ₃ O ₄ @SP@vanillin@thioglycolic Acid	4
Total Synthesis of Calothrixin B and a Novel Brominated Analog via C-H Activation and Heck Coupling	4
Synthesis of “Tablets Impurity” and “Impurity B” of Vigabatrin, an Antiepileptic Drug	4
An Efficient Strategy for the Synthesis of Fused-Ring Tetrahydro[b]pyrans Using P ₂ O ₅ /SiO	4
Carboxymethyl Cellulose (CMC) as a Recyclable and Biodegradable Catalyst: A Greener Solvent-free Preparation of Pyrano[2,3- d ]pyrimidines	4
One Pot Synthesis of Deterenol, a Sympathomimetic Ingredient of the Dietary Supplement Dexaprine	4
SbPh ₃ : An Efficient Catalyst for Dihydropyrimidinone and Dihydropyrimidin-5-carboxamide Synthesis Using the Biginelli Reaction	3
The Synthesis of gem-Bisamides Using a Carbocationic Catalytic System in Neutral Media	3
Synthesis, Characterization, Photophysical, and Computational Studies of Novel Iminocoumarin Derivatives	3
A Practical Green Synthesis of ( R )-5,7-difluorochroman-4-ol, a Key Intermediate of Tegoprazan	3
Functionalized Pyrimidines: Synthetic Approaches and Biological Activities. A Review	3
Application of Fe₃O₄@SiO₂-Propyl@dapsone-copper Complex Nanoparticles as a Magnetically Recoverable Catalyst for the Synthesis of Azo-linked andbis-Benzo[d]imid	3
Ammonium Acetate as an Efficient and Greener Catalyst for the Synthesis of 1 H -Pyrazolo[1,2- b ]phthalazine-5,10-diones in an Aqueous Med	3
A Recyclable Halide Perovskite Photocatalyst as a Single-electron Redox Mediator: Radical-initiated Gram-scale Photosynthesis of Pyrano[2,3 -d ]pyrimidines Induced by Vi	3
Synthesis of 3,4-Dihydropyrimidin-2-(1 H )-ones/thiones Catalyzed by Cetyltrimethylammonium Bromide (CTAB) in Aqueous Micellar Media: An Environmentally	3
Lithium Bromide: An Efficient Catalyst for the Environmentally-friendly Synthesis of Pyrano[2,3- d ]pyrimidines in an Aqueous Medium	3
New and Convergent Synthesis of Deucravacitinib	3
Fluorophosphoric Acid Promoted Formation of Imines of Sulfonamides and Dihydropyridines at Room Temperature	3
Facile Preparation of 3,6-Dimethoxy-2-nitrobenzaldehyde	3
Synthesis of Novel 1,2,4-Triazole Derivatives of N-Benzyl-5-nitroisatin: Anticancer Activity, Anti-oxidant Activity, and Molecular Design	3
Acylation of N-Boc-N’-COCF ₃ Protected Hydrazine	2
A Mild Synthetic Method for Selective Conversion of Camphene to Isoborneol Derivatives	2
Multi-gram Preparation of 1-(3-Dimethylamino propyl)-3-ethylurea (EDU)	2
Synthesis of Novel Amide Derivatives of the Sesquiterpene Aryl-himachalene	2
Sulfated Starch: A Highly Efficient Catalyst for Transamidation of Primary and Secondary Amines with Formamide and Acetamide	2
Development of a Novel and Scalable Process for the Synthesis of a Key Nafithromycin Intermediate	2
Synthesis of 2-Amino-4-aryl Thiazoles using Cu-NP/C Heterogeneous Catalyst	2
Curd Water as a Catalytic Solvent for the Preparation of bis -Coumarins	2
Synthesis, Characterization, and Applications of Novel Pd-coated Magnetic Nano-particles. Identification of a Highly Effective Heterogeneous Catalyst for Tandem Ullmann Cross-coupling/Reductive-cycliz	2
Synthesis and Chemical Reactions of 4-Aryl/heteroaryl Azo-3,5-diaminopyrazoles. A Brief Review	2
Recent Developments in Enantioselective Silver-Catalyzed Transformations	2
Facile Synthesis of Novel Cylopenta[ b ]indoles and Their Biological Assessments	2
Tartaric Acid as an Expeditious and Green Catalyst for the Synthesis of 1,2,4-Triazolidine-3-thiones in an Aqueous Medium	2
Synthesis of N-Benzoyl-4-O-(1H-Tetrazol-5-yl)-L-Tyrosine Ethyl Ester: A Functionalized Tyrosine Derivative	2

Natural Deep Eutectic Solvent as a Green Catalyst for the One-pot Synthesis of Chromene and 4H-Pyran Derivatives	2
An Alternate Feasible Route for the Synthesis of 4-Aminocoumarin	2
A Concise Account of Synthetic Approaches to 1,2,3-Triazoles	2
Mild Synthesis of Novel Azo-linked 4-Arylquinazoline-2,5( 3H , 6H )-diones and Azo-linked 4-Aryl-2-thioxoq	2
Guanidine Hydrochloride Catalyzed Efficient and Expeditious One-Pot Synthesis of 2, 4, 5-Triaryl Imidazole Derivatives	2
A Green, Facile, and Efficient Synthesis of 4H-Benzo[b]pyrans Using 2,2’-Bipyridine as a Recyclable Organocatalyst	2
Design, Synthesis, Anticancer Evaluation and Molecular Docking Studies of Amide Derivatives of 1,3,4-Thiadiazolyl Pyridinyl Isoxazoles	2
An Efficient Synthesis of Novel 7-Aryl-1 H -[1,2,4]triazolo[1,5- a ][1,3,5]triazine-5-selones from Aroyl Chlorides, Potassium Selenocyanat	2
Green Pathway for Solvent-free Synthesis of Tetrahydrobenzo[ b ]pyrans Promoted by Carboxymethyl Cellulose (CMC) as a Recyclable and Biodegradable Catalyst	2
A Greener Synthesis of N-( p -Toluenesulfonyl)imidazole Using the Bio-Renewable Solvent 2-MeTHF, Companion DFT Studies	2
Eggshell/Kaolin Calcined System: An Efficient, Green, and Recoverable Catalyst for the One-Pot Biginelli Reaction	2
Design, Synthesis, and Evaluation of Novel 2-(4-Benzylideneamino)phenoxy)acetamides as Antibacterial Agents	2
Fe₃O₄@THAM-SO₃H as an Efficient Heterogeneous Magnetic Nanocatalyst to Access Functionalized Pyrrole and Polyhydroquinoline Derivatives	1
Synthesis, Molecular Modeling, and Biological Evaluation of New N-(Benzo[d]thiazol-2-yl)-3-amino-but-2-enamide Derivatives as Cytotoxic Agents	1
Green Synthesis of 2-Amino-4 H -chromenes Using Sodium Stearate as a Lewis Base-surfactant Combined Catalyst (LBSC) in an Aqueous Micellar Medium	1
A Concise, Economical, and Eco-Friendly Two-Step Synthesis of 1-Adamantylamine Hydrochloride from Adamantane	1
Cu(NO ₃ ) ₂ /HNO ₃ Oxidation of Chloromethyl-aryl-himachalene: Synthesis of a Novel Aldehyde De	1
A Tris-Aldehyde Porphyrin Synthon: Synthesis and Characterization of 5,10,15-tris-(4’-(4-Formylphenoxy) propoxyphenyl)-20-(4-nitrophenyl)-porphyrin	1
Synthesis, Insecticidal Activity and DFT Study of 1,2,4-Triazolidinthione, 1,3,5-Oxadiazine and Thiourea Derivatives	1
Efficient Synthesis of Xanthenediones Using CuCeO₂ Nanoparticle Catalyst in Aqueous Medium	1
An Efficient Synthesis in Water of Novel Oxoquinolines and Their Anticancer Activities	1
Synthesis of 3-Aryl-4-phenyl-1-selenoxo-1,4-dihydro-9-oxa-2,4-diaza-phenanthren-10-ones via a One-pot Reaction	1
One-Pot Three-Component Synthesis of Novel 1-((4-Aminosulfonylphenyl)methyl)-5-aryl-4-benzoyl-3-hydroxy-3-pyrrolin-2-ones in Aqueous Media and Investigation of Their Antimicrobial Activity	1
An Efficient Synthesis of Curcumin Pyrazole Analogues and their Biological Activities	1
CuO-Kinnow Peel Nanocomposite as an Efficient Green Catalyst for the Preparation of Benzoxazoles and Benzothiazoles	1
Alternative Syntheses of 6-Dimethylamino-2,3-naphthalic and 4-Dimethylaminophthalic Anhydrides	1
An Efficient Solvent-free Synthesis of Spiro-substituted Cyclopropanes by Grinding	1
Synthesis of Novel Quinolines with Antibacterial Activity	1
Copper Phthalocyanine Tetrasulfonic Acid, a Recyclable Solid Acid Catalyst for the Synthesis of Aryl Iodides and Azides from Aryl Amines via Diazotization	1
L-Proline Catalyzed Synthesis of Heterocycles: A Review	1
Microwave-Assisted OPC-VH Mediated Synthesis of 2-Amino-1,3,4-thiadiazoles	1
Facile Synthesis of Substituted Pyrroles Using Silica Supported Catalysis	1
An Alternative Greener Synthesis of Dibenzalacetone	1
Synthesis of Substituted N- (4 H -1,2,4-Triazol-4-yl)benzamides as Potential Antifungal Agents	1
Alcoholysis of N -Substituted Amides and Carboxylic Acid Hydrazides in the Presence of Triflic Acid	1
1,2-Diaryl-4,5-diphenyl-1 H -imidazoles: Further Preparative Studies Using Amberlite IR120(H) as a Recyclable Heterogeneous Catalyst	1
A Novel Process for the Key Intermediate of Fluoroquinolones	1
Visible Light Assisted Synthesis of Tetrahydrobenzo[ b ]pyrans Using 4CzIPN, a Carbazole-Based Photocatalyst	1
Rapid Efficient Synthesis of 1,2,4-Triazolidine-3-Thiones in Aqueous Medium using Multiphase Bismuth Iron Oxide (mBFO) Catalyst	1
A Brief Review on the Synthesis of Pyrrolo[2,3-c]coumarins, including Lamellarin and Ningalin Scaffolds	1
New and Convergent Synthesis of Finerenone	1
Synthesis of Isoxazole-5(4 H )-ones Using Citrazinic Acid as an Organocatalyst in Aqueous Conditions	1
A New One-pot Synthesis of 4-Arylideneisoxazolones Catalyzed by Na ₂ SO ₃ in an Aqueous Medium	1
Eco-friendly Synthesis of 3-Methyl-4-arylmethyleneisoxazol-5(4 H )-ones. Crystal Structure, Hirshfeld Surface Analysis, and Theoretical Study	1
Regioselective Benzylation of N-Boc-N’-COCF₃-protected Hydrazine	1
Three-component Domino Reaction in Aqueous Media for the Synthesis of New Indeno[1,2- b ]pyrroles and Pyrrole-fused Isocoumarins and a Study of Their Antibacterial Prope	1
Synthesis of Lithocholic Acid from Plant-sourced Bisnoralcohol	1
Synthesis of Novel β-Lactams via Substitution Reactions of Thiolaryl Substituted β-Lactam Precursors	1
Synthesis of Pharma Europa Impurity-A of Flecainide Acetate	1
Novel Synthesis of Multifunctionalized Spiro[benzofurancyclobutanes] via Aqueous Three-component Reaction Catalyzed by Theophylline	1
Fe₃O₄@garlic peel-OSO₃H: Preparation, Characterization and Application as an Effective and Novel Nanocatalyst for One-Pot Synthesis of 2-Amino-3-phenylsulfonyl-4-aryl-	1
An Efficient One-Pot Synthesis of 2-Aryl-4,5-diphenyl-1H-imidazoles with Amberlite IR-120(H) as a Reusable Heterogeneous Catalyst	1
Emerging Approaches for Synthesis of 1,2,3-Triazole Derivatives. A Review	1
Rapid Access to Pyrano[2,3-d]pyrimidines Using Microwave Assisted [EMIM][OH] Catalysis	1
Advances in Catalyst-Driven Synthesis of Dihydropyrimidinones: A Review	1