OOIR: Observatory of International Research

Papers

(The TQCC of Organic Preparations and Procedures International is 2. 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 2021-02-01 to 2025-02-01.)

Article	Citations
An Improved Synthesis of DOPO-POSS	28
Choline Chloride-based Eutectic Mixtures for Greener Synthesis of Quinoxaline-2,3-diol Derivatives and Terephthalaldehyde bis-(2-Aminophenylimine)	21
CAN Combined with NaI as Promoter System for the Synthesis of Novel Ethyl 1,2-Diarylpyrrolidine-3-carboxylate Derivatives via Three-Component Reaction	21
One Pot Unexpected Isocyanide-based Three-component Synthesis of Pyrrole-3-carboxamides Containing Ether Groups	15
An Improved Procedure for the Synthesis of Amantadine Hydrochloride	12
Comparison of the Accelerating Effects of Two Ionic Liquids in the Oxidation of Alcohols	11
Alcoholysis of Primary Amides in the Presence of CF₃SO₃H	10
An Efficient Regioselective Preparation of Fulvestrant	10
Current Advances in Transition Metal-Free Access to Indoles. A Review	10
Menshutkin Reaction in Choline Chloride-based Deep Eutectic Solvents	10
Tartaric Acid as an Expeditious and Green Catalyst for the Synthesis of 1,2,4-Triazolidine-3-thiones in an Aqueous Medium	10
Synthesis and Antibacterial Activity of Novel 1,3-Oxazine Derivatives	10
Carboxymethyl Cellulose (CMC) as a Recyclable and Biodegradable Catalyst: A Greener Solvent-free Preparation of Pyrano[2,3- d ]pyrimidines	9
Facile, Expeditious and Cost-effective Preparation of N-Phthaloyl (S)-Amino Acids and Their in silico Activities against Staphylococcus Aureus	9
Improved Synthesis of Bepotastine Besilate	9
Synthesis of Dihydropyrano[2,3-c]pyrazoles Using Carboxymethyl Cellulose as a Recyclable Catalyst	9
Synthesis of Substituted N- (4 H -1,2,4-Triazol-4-yl)benzamides as Potential Antifungal Agents	9
A Greener Synthesis of N-( p -Toluenesulfonyl)imidazole Using the Bio-Renewable Solvent 2-MeTHF, Companion DFT Studies	8
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	8
Synthesis of 2,3-Dihydroquinazolinones via Condensation of 2-Aminobenzamides with Aldehydes under Ball Milling Conditions	8
A Green, Facile, and Efficient Synthesis of 4H-Benzo[b]pyrans Using 2,2’-Bipyridine as a Recyclable Organocatalyst	7
Synthesis of Pharma Europa Impurity-A of Flecainide Acetate	7
Synthesis of Lithocholic Acid from Plant-sourced Bisnoralcohol	6
Efficient TBAI-CS₂ Promoted Synthesis of Substituted Hydrazinecarbodithiolates	6
One-pot Three-component Synthesis of Novel 1,3,4-Thiadiazole-thiazolo[3,2-a]pyrimidine Derivatives Catalyzed by Molecular Iodine	6

Aluminized Polyborate: A New and Eco-friendly Catalyst for One-pot Multicomponent Synthesis of 1,3-Diaryl-3-(arylamino)propan-1-ones via Mannich Reaction	6
Efficient, Economic, and Large-scale Synthesis of 2, 4-Dichloro-10,11-dihydro-5H-dibenzo[a,d][7]annulen-5-one	6
ZnCl₂ Catalyzed Ring-Opening Reaction of Symmetrical Epoxides with Aromatic Amines for the Synthesis of 1,2-Amino Alcohols	6
Expeditious and Highly Efficient One-Pot Synthesis of Functionalized Imidazoles Catalyzed by Sulfated Polyborate	5
H ₆ P ₂ W ₁₈ O ₆₂ ·18H ₂	5
Highly Stereoselective and Scalable Synthesis of Eldecalcitol	5
A Novel Green Approach to the Synthesis of bis-4-Hydroxycoumarins	5
Synthesis of 3-Aryl-4-phenyl-1-selenoxo-1,4-dihydro-9-oxa-2,4-diaza-phenanthren-10-ones via a One-pot Reaction	5
An Efficient Synthesis of Novel Semicarbazones and Their Biological Activities	5
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	5
Recent Synthetic Applications of Hypervalent Iodine Reagents. A Review in Three Installments: Installment I	4
Preparation of Novel Chiral α-Diazocarbonyl Compounds Using Regitz’s Methodology	4
Microwave-Assisted Phase Transfer Catalytic Synthesis of Aryl Benzothiazole Derivatives and Their Anticancer Screening	4
Siletanes: Synthesis, Structure, and Reagents in Organic Synthesis. A Review	4
Synthesis and Antiproliferative Evaluation of Novel 5-Substituted Pyridazin-4-Amine Derivatives	4
An Improved and Efficient Approach for the Synthesis of Paliperidone	4
Facile Synthesis of Spirocyclic Oxindole Scaffolds via Intermolecular [4 + 1] Cycloaddition of ortho -Quinone Methides with 3-Chlorooxindoles	3
Copper Phthalocyanine Tetrasulfonic Acid, a Recyclable Solid Acid Catalyst for the Synthesis of Aryl Iodides and Azides from Aryl Amines via Diazotization	3
Green Pathway for Solvent-free Synthesis of Tetrahydrobenzo[ b ]pyrans Promoted by Carboxymethyl Cellulose (CMC) as a Recyclable and Biodegradable Catalyst	3
Microwave-Assisted OPC-VH Mediated Synthesis of 2-Amino-1,3,4-thiadiazoles	3
Keggin-Type Heteropoly-11-molybdo-1-vanadophosphoric Acid Supported on Montmorillonite K-10 Clay as a Catalyst for the Synthesis of Indeno[1,2-b]quinolinones: A Solvent-Free Approach	3
Multi-component Synthesis of 1,2,3-Triazoles from Carboxylic Acids, 3-Bromoprop-1-yne and Azides Using Click Chemistry	3
A Synthesis of Novel Selenophenes from Activated Acetylenes, Ethyl 2-Cyano-3-arylacrylate and Potassium Selenocyanate	3
Solvent-free Acetylation Procedure	3
A Green Approach to the Synthesis of 5-Arylidene-2,4-thiazolidinediones Using Aqueous SDS Micelle Catalysis	3
Development of a Novel and Scalable Process for the Synthesis of a Key Nafithromycin Intermediate	3
A Novel and Practical Method to Synthesize MB-07344	3
Synthesis of N^ω,Ν^ω–di-Boc-3-guanidylpropanal - An Important Reagent for Synthesis of Aza-Arg Precursors	3
A Tris-Aldehyde Porphyrin Synthon: Synthesis and Characterization of 5,10,15-tris-(4’-(4-Formylphenoxy) propoxyphenyl)-20-(4-nitrophenyl)-porphyrin	3
Sulfated Starch: A Highly Efficient Catalyst for Transamidation of Primary and Secondary Amines with Formamide and Acetamide	3
Multicomponent Synthesis of Trifluoromethyl-1H-benzo[f]chromenes Using Kit-6-NH ₂ @Schiff Base Complex Nanoparticles	3
Synthesis of 3-Substituted Indoles Using Deep Eutectic Solvent and Ultrasound	3
Synthesis, Characterization, in silico Molecular Docking and Antibacterial Properties of Some Tetrahydrobenzo[a]xanthene-11-ones	3
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	3
An Improved Synthesis of Sulfonyl Azides in Ionic Liquids	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
Facile Synthesis of Substituted Pyrroles Using Silica Supported Catalysis	3
Synthesis, Molecular Modeling, and Biological Evaluation of New N-(Benzo[d]thiazol-2-yl)-3-amino-but-2-enamide Derivatives as Cytotoxic Agents	3
AmberChrom/brine as a Green Catalytic System for Synthesis of Pyrrolin-2-ones	2
Synthesis of Thiazolidin-4-ones Using Novel Magnetic Nanoparticles Modified with S-Proline	2
An Efficient Solvent-free Synthesis of Spiro-substituted Cyclopropanes by Grinding	2
Green Synthesis of Aryl Naphthoxazine-2-thiones Using NiFe₂O₄@SiO₂ⁿPr@GA Under Ultrasound Irradiation	2
Facile Synthesis of Novel Cylopenta[ b ]indoles and Their Biological Assessments	2
Ethylene Glycol as a Reusable and Biodegradable Solvent for the Synthesis of 2-Amino-4 H -chromenes	2
Synthesis and Antiproliferative Evaluation of Novel 5-Aryl Substituted Oxazolo[4,5-b]pyridin-2-amine Derivatives	2
CeO₂/CuO@GQDs@NH₂ Nanocomposite as a Reusable Catalyst for the Preparation of bis-Pyrazoles	2
Preparation of Novel Bisphenanthro[9,10-d]imidazoles with an Efficient Copper Nano Magnetic Catalyst	2
Synthesis of “Tablets Impurity” and “Impurity B” of Vigabatrin, an Antiepileptic Drug	2
Catalyst-free Facile Synthesis of Novel Fused Spiro[benzo[4,5]thiazolo[3,2-a]pyrano[2,3-d]pyrimidine-4,3'-indoline]-3-carbonitrile Derivatives via One-pot Three-Component Reaction	2
Solar Energy Mediated Green Synthesis of Tetrahydrobenzo[b]pyrans Using L-Ascorbic Acid as an Organocatalyst in Aqueous Medium	2

Synthesis, Isolation, Characterization and Suppression of Impurities during Optimization of Empagliflozin (Jardiance)	2
An Improved Semi-synthesis of Tripchlorolide	2
Preparation and Biological Evaluation of Thymol Functionalized 2-Pyrazoline and Dihydropyrimidinone Hybrids	2