OOIR: Observatory of International Research

Papers

(The TQCC of Heterocycles 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 2021-04-01 to 2025-04-01.)

Article	Citations
Heterocycles Award	34
The Azalogues of Pyrrolotetrazole – An Overview	11
Contents	11
Contents	7
Facile and Efficient N-Boc Deprotection of Amide and Sulfonamide under Microwave Irradiation in Water	7
Microwave-Assisted Approach to Nitroaniline/Aminopyridine and Its Inhibition Activity of Seed Germination	7
Synthesis of Novel 2,3-Disubstituted Thiophenes via Tandem Thia-Michael/Aldol Reaction of Allenyl Esters	6
Supramolecular Chirogenesis in Amide-Linked Bis(Zinc Porphyrin): Application for Absolute Configurational Assignment of Chiral Calboxylic Acids and Chiral Amino Acids	6
Sparsomycin – a Review and Re-assessment	6
Ultrasound-Promoted Kabachnik–Fields Synthesis of Novel Chromonyl α-Aminophosphonate Derivatives Incorporating Nitrogen Heterocycles Using CdI2 Nanoparticles as an Efficient Catalyst: Evaluation of Th	5
Simultaneous Denitrative C–C Bond Formation and Construction of Pyrazole Ring Leading to 1,1'-Diphenyl-4,4'-bipyrazole	5
Direct Arylation of Furoxan Using Potassium Aryltrifluoroborates	5
Microwave-Assisted Synthesis of Phenylisoxazole Derivatives via 1,3-Dipolar Cycloaddition	5
Chemical Structures and Cytotoxic Activities of the Constituents Isolated from Citrus sphaerocarpa	4
Diterpenoid Alkaloids from Aconitum elliotii Lauener	4
The Synthesis of Simplified Analogues of Crambescin B Carboxylic Acid and Their Inhibitory Activity of Voltage-Gated Sodium Channels: New Aspects of Structure–Activity Relationships	4
Selective Synthesis of 2,2-Diamino-4,4,6,6-tetrakis(aryloxy)cyclotriphosphazenes N3P3-2,2-(NH2)2-4,4,6,6-(ArO)4	4
Functionalization of Phenothiazine Derivatives by Ammonium Bridge	4
Design, Synthesis, and Molecular Docking Studies of Chroman-4-one Linked Thiosemicarbazide Derivatives as Inhibitors of KatG and Anti-Mycobacterium tuberculosis Agents	4
Transnitrosation of Alicyclic N-Nitrosamines Containing Sulfur Atoms in Five- or Six-Membered Rings	4
Acid, Metal and Peroxide-Free Synthesis of 2,4,5-Trisubstituted Imidazoles Commencing from Internal Alkenes Using an Iodine/DMSO System	4
Diterpenoid Alkaloids from Delphinium pachycentrum Hemsl.	4
Thiofunctionalized γ-Lactams	4
Construction of Tetrahydroquinolines with Spirocyclic Structures at the 4-Position	3
Access to Functionalized Pyrrolophenanthridine via an ortho C-H Amination/Interannular C-H Arylation Cascade of N-Arylpyrroles	3

Design and Synthesis of 1,3-Bis(3-(trifluoromethyl)diazirin-3-yl)phenylalanine for Efficient Photo Cross-Linking	3
A New and Convenient Synthetic Method for 4-Aminoquinoline-3-carbonitrile and Its Derivatives	3
Contents	3
Synthesis and Antitumor Activity of Novel Linear Tricyclic Compounds Derived from Purine	3
Briarane-Type Diterpenoids from the Cultured Octocoral Briareum stechei (Kükenthal, 1908)	3
NH4I-Catalyzed Formal [4+2] Cycloaddition of α,β-Unsaturated O-Acetyl Oxime with Alkyl Pyruvate for Rapid Substituted Pyridine Formation	3
Diversity-Oriented Synthesis of 2-Substituted Purine Nucleosides from Available Nucleosides via the Late-Stage Nitration/Derivatization	3
Contents	3
Publications List by Somsak Ruchirawat	3
Five-Membered Nitrogen Heterocycles as New Lead Compounds in Drug Discovery	3
A New C,C-Linked Functionalized Bipyrazole: Synthesis, Crystal Structure, Spectroscopies and DFT Studies. Evaluation of the Antibacterial Activity and Catalytic Properties	3
Substituent Effects on Physical Properties of Azole Based Ionic Liquids	3
Synthesis of Polysubstituted 5,6-Dihydropyrrolo[3,4-b]pyrrol-4(1H)-ones from 2-[Aryl(azido)methyl]-1H-pyrrole-3-carboxylates via a Concise Three-Step Sequence	3
A Comprehensive Study of Pyrimidine and Its Medicinal Applications	2
Synthesis, Characterization and Biological Screening of New N-Substituted-7-chloro-4-hydroxy-2-quinolone-3-carboxamides as Promising Anticancer Agents	2
Chiral 1,2-Diaminocyclohexane-α-Amino Acid-Derived Amidphos/Ag(I)-Catalyzed Divergent Enantioselective 1,3-Dipolar Cycloaddition of Azomethine Ylides	2
A Series of Novel Coumarin Derivatives: Design, Synthesis and Evaluation of Anti-Tumor Activity	2
Contents	2
Synthesis and Optical Properties of Substituted 5,6,7,8-Tetraaza-azuleno[1,8-b,c]fluorenes, Small Organic Molecules of Unusual Topology Designed for Circularly Polarized Luminescence	2
Heterogeneously Organocatalytic, Enantioselective Friedel-Crafts Alkylation of Indole with 3,3,3-Trifluoropyruvate	2
Synthesis of Hepta-arbutin-branched β-Cyclodextrins at Their Primary Sides via Click Reaction	2
Synthesis of New Glycoluril Derivatives via Ring-Closing Metathesis	2
A New Compound Embeloside A with Hypoglycemic Potential from the Fruits of Embelia oblongifolia Hemsl.	2
Syntheses and Catalytic Properties of 1-Naphthoate-Copper-Bipy Complex	2
The Xanthate Route to Benzazepinones and Their Aza Congeners	2
New C19-Diterpeniod Alkaloids from Aconitum novoluridum	2
Synthesis of 2-Trifluoroacetonyl-3-alkyl/alkoxychromones and Their Reactions with 1,2-Bidentate Nucleophiles	2
Development of 5-Trifluoromethylpyrimidine Derivatives as Dual Inhibitors of EGFR and Src for Cancer Therapy	2
Inhibition of Amyloid-β Aggregation by p-Terphenyls from the Mushroom Polyozellus multiplex and Their Neuroprotective Effects	2
A New Monoterpenoid Indole Alkaloid from Uncaria rhynchophylla	2
Evaluation of 1,3-Thiazole Derivatives with Pharmaceutical and Chemical Activity: a Review	2
Effects of Degree of Polymerization of B-Type Procyanidins on Amyloid Aggregation	2
Asymmetric Synthesis of the Unnatural Enantiomer of Codonopsinine and a Stereoisomer via Alkoxyallenes	2
Mapping the Antimicrobial Activity of Indoloquinoline and Neocryptolepine Analogues	2
Three New Nervogenic Acid Derivatives from Liparis nervosa	2
Rapid, Environmentally Greener and Ultrasound-Assisted One-Pot Synthesis of Quinoline, Benzimidazole and Pyrimidine Combined Moiety as Potential Antimicrobial Agents	2
Diterpene Glycosides Derived from Aster spathulifolius Have Immunomodulatory Effects	2
Ruthenium(II)-Catalyzed ortho Hydroxymethylation of 6-Arylpurines with Paraformaldehyde via Purine-Directed C-H Activation	1
Direct β-Alkenylation of Thiophenes with Alkenyl Halides Catalyzed by a Dinuclear Palladium Complex	1
Unusual Cembrane Diterpenoid Isolated from the Japanese Soft Coral Genus Sinularia	1
Contents	1
Azuleno[6,5-b]indoles: Palladium-Catalyzed Oxidative Ring-Closing Reaction of 6-(Arylamino)azulenes	1
MS 4A-Promoted Aqueous Phospho-Aldol-Brook Rearrangement Reaction of Isatins	1
Synthesis of New Multivalent Furo[3,2-c]pyridine and Bifuro[3,2-c]pyridine Derivatives	1
Synthesis and Biological Activity of Aminoisoquinoline Schiff Bases	1
Contents	1
Synthesis of 2,3-Anthracenedicarboxylic-acid-derived Fluorophore and Chemiluminophore Incorporating Dipicolylaminomethyl Receptors, and Their Luminescence Responses to Metal Ions	1
2-Arylazoimidazoles Revamped by Quarternization or Dimerization; Another Gain in Functionality of an Industrial Dyestuff Family by Task-Specific Side-Chain Substituents	1
Non-Planar Polycyclic Aromatic Molecules Including Heterole Units	1
Synthesis and Characterization of 6-Chloro-N-(substituted benzylidene)benzothiazol-2-amine by Microwave Irradiation	1

Isolation of Ikahonone, 4-Methyl-2,4-dihydroxy-3-pentanone from Bacillus cereus IFM12235	1
Comprehensive Synthesis of 20 Fentanyl Derivatives for Their Rapid Differentiation by GC-MS Analysis	1
3-[2-Oxo-2H-chromen-3(6)(8)-yl]-1-aryl/heteroaryl-1H-pyrazole-4-carbaldehydes: Synthesis, Reactions and Applications	1
N-Heterocyclic Analogs of Indenocorannulene	1
Synthesis, Cytotoxicity and Docking Simulation of Bioactive [1,2,4]Triazolo[3,4-α]dihydroisoquinoline Chalcone Derivatives	1
Facile Protocol for the Synthesis of Electron-Rich Benzimidazole Derivatives	1
Facile Synthesis of Fully Conjugated Aminopyrazine Based Diazobenzenes and Diazoaminobenzenes with Aryldiazonium Salts	1
Synthetic Approaches for Construction of Novel Angular Heterocyclic Systems Containing Chromeno[2,3-b]quinoline	1
Rh(III)-Catalyzed Cascade C-H Activation/Annulation of Cyclic 2-Diazo-1,3-diketones with Benzoylacetonitriles to Polycyclic Benzo[de]chromenes	1
A Microwave-Assisted, Two-Step Synthesis of Indolo[3,2-c]quinolines via Fischer Indolization and Oxidative Aromatization	1
Lipase-Catalyzed Site-Selective Deacetylation of 2-Methoxy-3-methylnaphthalene-1,4-diol Diacetate for Construction of Characteristic Substituted 1,2,3,4-Tetrahydroisoquinoline Derivative of Novel Ecte	1
FAB-MS Measurement of 2-Hydroxyestrone and Monosaccharides Assisted by 4-Pyridineboronic Ester Derivatization	1
Synthesis of Amide-Functionalized Thia[7]helicene-Like Molecule and Its Supramolecular Assembly in the Solid State	1
L-Malic Acid as Chiral Auxiliary and Building Block in the Asymmetric Synthesis of (S)-(−)-Crispine A	1
Heterocycles Award	1
Recent Progress on Synthesis of Spirochromanone and Spirochromane Derivatives	1
Direct Arylation of Benzothiophene and Benzofuran Catalyzed by a Dinuclear Palladium Complex	1
Contents	1
An Efficient Synthesis of (Aryl)(4-(2-(arylethynyl)-phenyl)-1H-pyrrol-3-yl)methanone from the Reaction of (E)-1-Aryl-3-(2-(arylethynyl)phenyl)prop-2-en-1-one and p-Toluenesulfonylmethyl Isocyanide	1
An Efficient Catalyst-Free Synthesis of Vinyl Sulfides in Aqueous-Phase	1
Encapsulation of Cofacial Diarylacetylene Dimers Using [C2]Daisy Chain Rotaxane Strategy	1
Antimicrobial Activities of Heliciopsis terminalis Trunk Extract	1
Reaction Pathway and Kinetic Study of 4,5-Dihydroxyimidazolidine-2-thione Synthesis by HPLC and NMR	1
Efficient Synthesis of Novel Spiro[indoline-3,5'-pyrano[2,3-d]pyrimidin]-2-one Derivatives and Antitumor Activity Evaluation	1
Synthesis and Stereochemical Analysis of Planar Chiral Nine-Membered Aza-Orthocyclophyne	1
Synthesis, Characterization, and Computational Studies of Some Perfluorinated Cyclopentapyridazines for Biological Applications	1
Synthesis and Reactivity of Novel 5-Imino-1,2-oxazole	1
Synthesis and Cytotoxic Activity of Wrightiadione and Its Derivatives	1
Contents	1
Synthesis and Antimicrobial Activity of 2,5-bis(Pyrazol-3-yl or Triazol-4-yl)-1,3,4-oxadiazoles	1
Design and Synthesis of New Quinoline Linked to Pyranotriazolopyrimidines Conjugates as Novel Targets to Discover Promising Anti-SARS-COV-2	1
Design, Synthesis, and Biological Evaluation of 4H-Pyrido[1,2-a]pyrimidin-4-one Derivatives as Anticancer Agents via ROR1 Inhibition	1
The Utility of Oxoammonium Species in Organic Synthesis: Beyond Alcohol Oxidation	1
Diversity-Oriented, One Step Synthesis of Chromeno[2,3-b]Indoles and Thiochromeno[2,3-b]Indoles under Microwave-Assisted Conditions	1
Synthesis and Photophysical Properties of Diethynylated Bibenzofuran and Benzodifuran Derivatives	1
(7S)-Macaureas A and B, Two Urea Analogues from the Roots of Lepidium meyenii	1
Contents	1
Syntheses of Two New Fluorous Crown Ethers Carrying Sugar Molecules with a Multivalent Bfp Modification: Investigations of Their Partition Ratios in Fluorous Biphasic Systems and Recyclability During	1
New Anti-TMV Isochromenes from Nicotiana Tabacum-Derived Endophytic Fungus Aspergillus Versicolor	1
Reaction of an Overcrowded 1,2-Diaryl-1,2-dibromodisilene with 1-Vinylcyclohepta-1,3,5-triene: Isolation of a 2-Vinylsilacyclopropane Derivative and Its Thermal Conversion to a Silacyclopent-3-ene Der	1
Synthesis of 1-Azaspiro[4,5]-7-decen-2-one from L-Asparagine and L-Aspartic Acid	1
Reactivity of 4-Bromoacetyl-1,2,3-triazoles towards Amines and Phenols: Synthesis and Antimicrobial Activity of Novel Heterocycles	1
New Dimeric Cytisine-Type Alkaloid and Lavandulyl Biflavonoid from Sophora flavescens AIT. and Their Inhibitory Effect on Cancer Cells	1
A Convenient Synthesis of 5-Trifluoromethyl-5-cyclopropyl-Substituted Pyrazolines	1
A New Natural Butenolide, (5R)-3-Tetradecyl-5-methyl-2(5H)-furanone, from Octocoral Cladiella conifera	1
Construction of Supramolecular Frameworks Comprised of Fully-Substituted Cyclopentanocucurbit[6]uril and Two Phenolic Acids	1
Synthesis and Antitumor Activity of Heterocylic Aurone and Its Analogue Indanone Derivatives	1
N-Alkylation of Azoles with Enones Assisted by P(III) or Fe2O3-Nanoparticles as Recyclable Catalyst	1
Characterization of Teaghrelin-Like Compounds from Tea Cultivars in Thailand and in silico Study of Their Bioactivity	1
Synthesis, Biological Evaluation, and In Silico Studies of New Heterocycles Incorporating 4,5,6,7-Tetrabromophthalimide Moiety as Potential Antibacterial and Anticancer Agents	1
Synthesis of Penicolinates A, C and D	1