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 2021-04-01 to 2025-04-01.)

Article	Citations
An Improved Synthesis of DOPO-POSS	42
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	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
Development of a Novel and Scalable Process for the Synthesis of a Key Nafithromycin Intermediate	19
Copper Phthalocyanine Tetrasulfonic Acid, a Recyclable Solid Acid Catalyst for the Synthesis of Aryl Iodides and Azides from Aryl Amines via Diazotization	16
One Pot Unexpected Isocyanide-based Three-component Synthesis of Pyrrole-3-carboxamides Containing Ether Groups	14
Choline Chloride-based Eutectic Mixtures for Greener Synthesis of Quinoxaline-2,3-diol Derivatives and Terephthalaldehyde bis-(2-Aminophenylimine)	13
An Improved Procedure for the Synthesis of Amantadine Hydrochloride	13
An Efficient Regioselective Preparation of Fulvestrant	10
Comparison of the Accelerating Effects of Two Ionic Liquids in the Oxidation of Alcohols	10
Current Advances in Transition Metal-Free Access to Indoles. A Review	10
Menshutkin Reaction in Choline Chloride-based Deep Eutectic Solvents	10
Synthesis of Substituted N- (4 H -1,2,4-Triazol-4-yl)benzamides as Potential Antifungal Agents	10
Synthesis of Lithocholic Acid from Plant-sourced Bisnoralcohol	9
Synthesis of 2,3-Dihydroquinazolinones via Condensation of 2-Aminobenzamides with Aldehydes under Ball Milling Conditions	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 Pharma Europa Impurity-A of Flecainide Acetate	8
A Green, Facile, and Efficient Synthesis of 4H-Benzo[b]pyrans Using 2,2’-Bipyridine as a Recyclable Organocatalyst	7
Highly Stereoselective and Scalable Synthesis of Eldecalcitol	7
Recent Synthetic Applications of Hypervalent Iodine Reagents. A Review in Three Installments: Installment I	6
Synthesis of 3-Aryl-4-phenyl-1-selenoxo-1,4-dihydro-9-oxa-2,4-diaza-phenanthren-10-ones via a One-pot Reaction	6
One-pot Three-component Synthesis of Novel 1,3,4-Thiadiazole-thiazolo[3,2-a]pyrimidine Derivatives Catalyzed by Molecular Iodine	6
Efficient TBAI-CS₂ Promoted Synthesis of Substituted Hydrazinecarbodithiolates	6
Siletanes: Synthesis, Structure, and Reagents in Organic Synthesis. A Review	6

Efficient, Economic, and Large-scale Synthesis of 2, 4-Dichloro-10,11-dihydro-5H-dibenzo[a,d][7]annulen-5-one	6
An Improved and Efficient Approach for the Synthesis of Paliperidone	6
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
Carboxymethyl Cellulose (CMC) as a Recyclable and Biodegradable Catalyst: A Greener Solvent-free Preparation of Pyrano[2,3- d ]pyrimidines	5
Alcoholysis of Primary Amides in the Presence of CF₃SO₃H	5
Synthesis of Dihydropyrano[2,3-c]pyrazoles Using Carboxymethyl Cellulose as a Recyclable Catalyst	5
H ₆ P ₂ W ₁₈ O ₆₂ ·18H ₂	4
An Efficient Synthesis of Novel Semicarbazones and Their Biological Activities	4
Microwave-Assisted Phase Transfer Catalytic Synthesis of Aryl Benzothiazole Derivatives and Their Anticancer Screening	4
Synthesis and Antibacterial Activity of Novel 1,3-Oxazine Derivatives	4
A Novel Green Approach to the Synthesis of bis-4-Hydroxycoumarins	4
Synthesis and Antiproliferative Evaluation of Novel 5-Substituted Pyridazin-4-Amine Derivatives	4
ZnCl₂ Catalyzed Ring-Opening Reaction of Symmetrical Epoxides with Aromatic Amines for the Synthesis of 1,2-Amino Alcohols	4
Expeditious and Highly Efficient One-Pot Synthesis of Functionalized Imidazoles Catalyzed by Sulfated Polyborate	3
Synthesis of N^ω,Ν^ω–di-Boc-3-guanidylpropanal - An Important Reagent for Synthesis of Aza-Arg Precursors	3
Design, Synthesis, Anticancer Evaluation and Molecular Docking Studies of Amide Derivatives of Thienopyrimidine Isoxazoles	3
Synthesis of Thiazolidin-4-ones Using Novel Magnetic Nanoparticles Modified with S-Proline	3
Tartaric Acid as an Expeditious and Green Catalyst for the Synthesis of 1,2,4-Triazolidine-3-thiones in an Aqueous Medium	3
Green Pathway for Solvent-free Synthesis of Tetrahydrobenzo[ b ]pyrans Promoted by Carboxymethyl Cellulose (CMC) as a Recyclable and Biodegradable Catalyst	3
Synthesis of 3-Substituted Indoles Using Deep Eutectic Solvent and Ultrasound	3
Multi-component Synthesis of 1,2,3-Triazoles from Carboxylic Acids, 3-Bromoprop-1-yne and Azides Using Click Chemistry	3
Synthesis of Novel Amide Derivatives of the Sesquiterpene Aryl-himachalene	3
An Improved Synthesis of Sulfonyl Azides in Ionic Liquids	3
Facile, Expeditious and Cost-effective Preparation of N-Phthaloyl (S)-Amino Acids and Their in silico Activities against Staphylococcus Aureus	3
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	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
Acridine Yellow G: A Photo-induced Electron Transfer Photocatalyst for the Radical Synthesis of Pyrano[2,3- d ]pyrimidines in an Aqueous Medium	3
Solvent-free Acetylation Procedure	3
Preparation of Novel Chiral α-Diazocarbonyl Compounds Using Regitz’s Methodology	3
Selective One-pot Synthesis of 2-Aryl-1-arylmethyl-1H-1,3-benzimidazoles in the Presence of Ammonium Persulfate and Their Antioxidant Activity	2
Synthesis and Antiproliferative Evaluation of Novel 5-Aryl Substituted Oxazolo[4,5-b]pyridin-2-amine Derivatives	2
Preparation and Biological Evaluation of Thymol Functionalized 2-Pyrazoline and Dihydropyrimidinone Hybrids	2
Synthesis, Isolation, Characterization and Suppression of Impurities during Optimization of Empagliflozin (Jardiance)	2
Microwave-Assisted Iodotrimethylsilane-Promoted Synthesis of Novel Pyrazolyl Chalcones	2
Catalytic Evaluation of Surface Engineered Activated Carbon with SnO ₂ Nanoparticles for Synthesis of Dihydropyrimidinones at Room Temperature	2
Ethylene Glycol as a Reusable and Biodegradable Solvent for the Synthesis of 2-Amino-4 H -chromenes	2
A Green Approach to the Synthesis of 5-Arylidene-2,4-thiazolidinediones Using Aqueous SDS Micelle Catalysis	2
AmberChrom/brine as a Green Catalytic System for Synthesis of Pyrrolin-2-ones	2
Preparation of Novel Bisphenanthro[9,10-d]imidazoles with an Efficient Copper Nano Magnetic Catalyst	2
Facile Synthesis of Novel Cylopenta[ b ]indoles and Their Biological Assessments	2
An Efficient Solvent-free Synthesis of Spiro-substituted Cyclopropanes by Grinding	2
Regioselective Benzylation of N-Boc-N’-COCF₃-protected Hydrazine	2
Efficient Synthesis of Xanthenediones Using CuCeO₂ Nanoparticle Catalyst in Aqueous Medium	2
Facile Synthesis of Substituted Pyrroles Using Silica Supported Catalysis	2
CeO₂/CuO@GQDs@NH₂ Nanocomposite as a Reusable Catalyst for the Preparation of bis-Pyrazoles	2
Synthesis of “Tablets Impurity” and “Impurity B” of Vigabatrin, an Antiepileptic Drug	2
Nano-[Fe₃O₄@SiO₂-R-NHMe₂][H₂PO₄] as a Highly Effectual and Magnetically Recyclable Catalyst for the Preparation of bis(6-Amino-1,3-dim	2
Facile Multi-gram Preparation of trans-7,8-Dihydro-7,8-dihydroxybenzo[a]pyrene, a Precursor of Benzopyrene Diol Epoxide	2
One-pot Synthesis of Tetrahydrobenzo[4,5]imidazo[2, 1-b]quinazolin-1(2H)-ones Usingβ-Cyclodextrin-SO₃H as a Biocompatible and Recoverable Catalyst in Water	2