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Ushakov Igor Alekseevich

Publications in Math-Net.Ru

  1. Catalyst-free cyclization of DBU with α,β-ynones: substituent-controlled divergence

    Mendeleev Commun., 36:2 (2026),  171–173
  2. Acetylene-driven superbase-mediated self-organization of (het)arylpyridines from (het)aromatic nitriles

    Mendeleev Commun., 35:6 (2025),  636–638
  3. One-pot assembly of functionalized (m-terphenyl-4'-yl)isoquinolines from 1-methylisoquinoline and electrophilic acylacetylenes

    Mendeleev Commun., 35:4 (2025),  457–460
  4. One-pot synthesis of functionalized dihydroindolizinones from pyrrolylpropynoates and diethyl aminomalonate

    Mendeleev Commun., 35:1 (2025),  99–101
  5. One-pot synthesis of pyrrolooxazoles from pyrrolyl acetylenic ketones and natural aldehydes

    Mendeleev Commun., 35:1 (2025),  14–17
  6. Reaction of benzonitriles with acetylene in the KOBut/DMSO/THF system: self-organization of 2-aryl-3-ethynyl-4-aroyl-5-methylpyrroles and aminoacroleins

    Mendeleev Commun., 34:6 (2024),  868–870
  7. The reaction of acetylenes with aldazines in the NaOBut/DMSO system: a contribution to the pyrazole chemistry

    Mendeleev Commun., 34:1 (2024),  110–112
  8. Aza-Favorsky reaction with regioisomeric C- and N-linked 1,4-bis(imino)benzenes: Synthetic and reactivity dissimilarities

    Mendeleev Commun., 33:5 (2023),  642–644
  9. A facile synthesis of 2-ethynylpyrroles by ButOK-assisted room temperature deprotection of 2-(acylethynyl)pyrroles

    Mendeleev Commun., 33:4 (2023),  458–460
  10. Cationic palladium(II)–acetylacetonate complexes bearing pyridinyl imine ligands as catalysts for the hydroamination of phenylacetylene and polymerization of norbornene

    Mendeleev Commun., 33:2 (2023),  184–187
  11. Acetylene-driven multi-molecular assemblies of high complexity: imidazo[1,2-a]pyridines and 5-chloro-N-[2-(imidazo[1,2-a]pyridin-6-yl)vinyl]pyridin-2-amine

    Mendeleev Commun., 33:2 (2023),  164–166
  12. Diversifying the superbase-catalyzed C=N bond ethynylation: triaryl-1-pyrrolines and triaryl-1H-pyrroles from N-benzyl aldimines and arylacetylenes

    Mendeleev Commun., 33:1 (2023),  24–26
  13. Acyl-tetrahydroindolyl-capped 1,3-diynes in oxidative [4 + 2]-cycloaddition with benzylamine: a one-pot access to 2-acyl-6-phenyl-5-tetrahydroindolylpyridines

    Mendeleev Commun., 32:6 (2022),  729–731
  14. Antibacterial activity of new silatrane pyrrole-2-carboxamide hybrids

    Mendeleev Commun., 31:2 (2021),  204–206
  15. Diels–Alder trapping vs. amidoalkylation of cyclopentadiene with polychloroacetaldehyde sulfonylimines

    Mendeleev Commun., 30:5 (2020),  618–620
  16. Multimolecular self-organization of acetylene and arylamines into 1-aryl-3-ethyl-4-vinylpyrroles in the KOBut/DMSO system

    Mendeleev Commun., 30:3 (2020),  315–317
  17. Amide derivatives of 3-aminopropylsilatrane

    Mendeleev Commun., 29:6 (2019),  688–689
  18. Synthesis of oxazolines and oxazoles by the reaction of propynals with tosylmethyl isocyanide

    Mendeleev Commun., 29:6 (2019),  651–652
  19. Copper(I) halide-promoted formation of 3-acyl-5-halopyridine moiety from NH-2-(2-acylethynyl)pyrroles and propargylamine

    Mendeleev Commun., 29:3 (2019),  252–253
  20. 1,2,5-Oxadiazolo[3,4-g]indoles via annelation of 6,7-dihydrobenzo[c][1,2,5]oxadiazol-4(5H)-one oxime with acetylene

    Mendeleev Commun., 29:1 (2019),  53–54
  21. Diastereoselective synthesis of 5-hydroxy-3-methylalkane-1,6-diones from ketones and acetylene in two atom-economic steps

    Mendeleev Commun., 29:1 (2019),  17–18
  22. Unfolding the frontalin chemistry: a facile selective hydrogenation of 7-methylidene-6,8-dioxabicyclo[3.2.1]octanes, 2:2 ensembles of ketones and acetylene

    Mendeleev Commun., 28:5 (2018),  513–514
  23. 2,4,6-Trisubstituted 3,4-dihydropyrans from acetylene and ketones: deacetylation in the KOBut/DMSO system

    Mendeleev Commun., 28:2 (2018),  145–146
  24. Dioximes of 1,6-heptanediones from acetylene and ketones: only three atom-economic steps

    Mendeleev Commun., 28:2 (2018),  143–144
  25. DBU as a scaffold for the synthesis of [1,3]oxazolo[2’,3’ : 2,3]pyrimido-[1,2-a]azepines: annulation with aromatic cyanopropargylic alcohols

    Mendeleev Commun., 28:2 (2018),  128–130
  26. Reaction of 1-(het)aryl-3-bromoprop-2-ynones with furans in solid metal oxides or salts: cross-coupling or cycloaddition?

    Mendeleev Commun., 28:1 (2018),  20–21
  27. Novel α,β-unsaturated imine derivatives of 3-aminopropylsilatrane

    Mendeleev Commun., 27:5 (2017),  443–445
  28. Multi-channel annulation of acetylene with 3-methyl-7,8-dihydrocinnolin-5(6H)-one oxime in the KOH/DMSO superbasic system

    Mendeleev Commun., 27:4 (2017),  344–345
  29. Novel guanidinium salts of biologically active (het)arylchalcogenylacetic acids

    Mendeleev Commun., 27:1 (2017),  88–89
  30. Aluminium oxide-mediated cross-coupling of pyrroles with 1-bromo-2-(trifluoroacetyl)acetylene: a quantum-chemical insight

    Mendeleev Commun., 26:6 (2016),  480–482
  31. Base-catalyzed cascade dimerization of γ-aryl-β,γ-enones into acylated terphenyls

    Mendeleev Commun., 26:5 (2016),  378–379
  32. Insertion of 1,3-diphenylprop-2-yn-1-one into imidazo[4,5-b]pyridines in the presence of water: one-pot synthesis of pyrido[2,3-b][1,4]diazocin-9-ones

    Mendeleev Commun., 26:1 (2016),  16–18
  33. The reaction of 1,5,6-trimethylbenzimidazole with 1,3-diphenylprop-2-yn-1-one and water: en route to β-amino enones and benzodiazocinones

    Mendeleev Commun., 25:4 (2015),  254–256
  34. Base-catalyzed α-vinylation of ketones with acetylenes as a key step in one-pot synthesis of pyrazolines and pyrazoles

    Mendeleev Commun., 25:2 (2015),  131–132
  35. Reaction of (het)aryl cyclohexyl ketoximes with acetylene in the two-phase KOH/DMSO/n-hexane system: en route to spirocyclic 3H-pyrroles

    Mendeleev Commun., 25:2 (2015),  129–130
  36. 2-(2-Ethynyl-1-aziranyl)-3,4-dihydro-2H-pyrrole: a one-pot assembly from isopropyl phenyl ketoxime and acetylene during the synthesis of 3H-pyrrole

    Mendeleev Commun., 24:6 (2014),  368–369
  37. Novel complexes of 1-(2-hydroxyethyl)-2-methyl-5-nitroimidazole with metal acetates and arylchalcogenylacetates

    Mendeleev Commun., 24:5 (2014),  293–294
  38. Synthesis of trifluoromethylated [1,4]diazepines from 1,1,1-trifluoroalk-3-yn-2-ones

    Mendeleev Commun., 24:5 (2014),  269–271
  39. Vinylation of trialkylamines with acyl- and cyanoacetylenes via C–N bond cleavage in the presence of water

    Mendeleev Commun., 24:4 (2014),  209–210
  40. 2,4-Diphenylpyrido[2,1-a]isoquinolinium nitrite from the domino reaction between isoquinoline, 1,3-diphenylprop-2-yn-1-one and nitromethane

    Mendeleev Commun., 24:3 (2014),  156–158
  41. Synthesis of 3,3-dimethyl-2-phenyl-3H-pyrrole from Isopropyl Phenyl Ketoxime and Acetylene: A Side Formation of 4,4-dimethyl-5-phenyl-1-vinyl-2-pyrrolidinone as Clue to the Reaction Mechanism

    Mendeleev Commun., 24:2 (2014),  100–101
  42. One-pot synthesis of 3-(E)-styrylpyrroles from (E)-styrylmethyl ketoximes and acetylene

    Mendeleev Commun., 23:6 (2013),  340–341
  43. Superbase-catalyzed addition of ketones to propargyl and allenyl ethers in the KOH (KOBut)/DMSO system

    Mendeleev Commun., 23:4 (2013),  204–205
  44. Modification of g-Aminobutyric Acid with Acylacetylenes: Stereoselective C-Vinylation of the Primary Adducts and Transformation to Acylpyridines

    Mendeleev Commun., 22:6 (2012),  314–316
  45. Regioselective Formylation of 1-(2-Oxiranylmethyl)-4,5,6,7-tetrahydroindole with DMF/(COCl)2: the Pyrrole vs. Oxirane Nucleophilicity

    Mendeleev Commun., 22:5 (2012),  265–266
  46. Consecutive Reactions of Dialkyl Ethynyl Carbinols with Acetylene in Superbase KOH/DMSO Suspension

    Mendeleev Commun., 22:3 (2012),  132–133
  47. Stereospecific protonation of pyrrole-2-carboxaldehyde Z-oximes as a result of through-space cation stabilization with oxime hydroxyl

    Mendeleev Commun., 21:2 (2011),  103–105
  48. The reaction of 2-arylazo-1-vinylpyrroles with trifluoroacetic anhydride: unexpected formation of N-aryl-2,2,2-trifluoroacetamides and conjugated polymers

    Mendeleev Commun., 21:1 (2011),  36–37
  49. High-resolution nuclear magnetic resonance in paramagnetic complexes

    Usp. Khim., 79:10 (2010),  915–928
  50. (Z)-1-Organyl-2-(2,4-dicyano-1,3-diphenyl-1,3-butadienyl)imidazoles from 1-substituted imidazoles with phenylcyanoacetylene

    Mendeleev Commun., 19:1 (2009),  42–44
  51. Nucleophilic addition of secondary phosphine chalcogenides to, α,β-acetylenic γ-hydroxy acid nitriles and a rearrangement of the adducts

    Mendeleev Commun., 17:6 (2007),  325–326
  52. A peculiar selective rearrangement during the NiS-catalysed dehydrogenation of 4,5-dihydro-1H-benz[g]indole

    Mendeleev Commun., 17:5 (2007),  296–298
  53. Free-radical addition of phosphine sulfides to aryl and hetaryl acetylenes: unprecedented stereoselectivity

    Mendeleev Commun., 17:3 (2007),  181–182
  54. Unexpected formation of 4-methyl-1-vinyl-δ-carboline in the reaction of 3-acetylindole oxime with acetylene

    Mendeleev Commun., 17:1 (2007),  40–42
  55. Unexpected double α,β-addition of secondary phosphine chalcogenides to 3-phenyl-2-propynenitrile

    Mendeleev Commun., 15:5 (2005),  183–184
  56. An example of the facile C-vinylation of pyrroles

    Mendeleev Commun., 8:3 (1998),  119–120

© Steklov Math. Inst. of RAS, 2026