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Molbank, Volume 2025, Issue 4

December 2025 - 50 articles

Cover Story: The methylation of cycloocteno-1,2,3-selenadiaziole results in the formation of two isomeric methyl-1,2,3-selenadiazolium salts. The 3-methyl isomer is the major compound, the minor, 2-methyl, isomer is presented here. A full spectroscopic characterization, including two-dimensional 1H-, 13C-NMR, and 77Se- and 15N-NMR, has been performed and the results are compared with the data of the 3-methyl isomer. X-ray analyses of two different crystals, a triclinic and an orthorhombic,  are reported. View this paper
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Articles (50)

  • Short Note
  • Open Access
213 Views
7 Pages

P,P,P′,P′-Tetraisopropyl(1,4-phenylenebis(hydroxymethylene))bis(phosphonate)

  • Jaden K. Jones,
  • Aidan P. McKay,
  • David B. Cordes and
  • Brian A. Chalmers

8 December 2025

We report the synthesis and molecular structure as determined by single-crystal X-ray diffraction of P,P,P′,P′-tetraisopropyl(1,4-phenylenebis(hydroxymethylene))bis(phosphonate). The compound was fully characterized by 1H, 13C, and 31P NM...

  • Short Note
  • Open Access
162 Views
4 Pages

N-(9-Ethyl-9H-carbazol-2-yl)-N′-(1-phenylethyl)thiourea

  • Agnieszka Maksymiuk-Kłos,
  • Rafał Słapa,
  • Marek Bartkowiak,
  • Radosław Michalik,
  • Monika Pazura-Turowska,
  • Dorota Szubińska-Lelonkiewicz and
  • Anna Bielenica

5 December 2025

Substituted thiourea derivatives represent a structurally diverse group of compounds with high biological activity. In this paper, we present the synthesis of N-(9-ethyl-9H-carbazol-2-yl)-N′-(1-phenylethyl)thiourea by condensation reaction. The...

  • Short Note
  • Open Access
187 Views
7 Pages

Bis(1,2,4-triphenylcyclopentadienyl) Terbium 4,4,4-trifluoro-1-phenylbutane-1,3-dionate

  • Daniil A. Bardonov,
  • Mikhail E. Minyaev,
  • Lada N. Puntus,
  • Ilya E. Nifant’ev and
  • Dmitrii M. Roitershtein

4 December 2025

A new bis(cyclopentadienyl) terbium(III) complex with 1,2,4-triphenylcyclopentadienyl and 4,4,4-trifluoro-1-phenylbutane-1,3-dionate ligands was synthesized. Single-crystal X-ray analysis revealed a mononuclear bis(cyclopentadienyl) complex with a di...

  • Short Note
  • Open Access
159 Views
5 Pages

Methyl (1aRS,7aSR)-7-formyl-1a-phenyl-1,1a-dihydroazirino[2,3-b]benzo[e][1,4]thiazine-7a(7H)-carboxylate

  • Ilya P. Filippov,
  • Anastasiya V. Agafonova,
  • Nikolai V. Rostovskii and
  • Mikhail S. Novikov

4 December 2025

The first representative of the aziridine-fused benzo[e][1,4]thiazine series was synthesized from methyl 2-bromo-2-phenyl-2H-azirine-2-carboxylate and benzo[d]thiazole in 74% yield. The reaction proceeds via the SN2′-SN2′-cascade to form...

  • Short Note
  • Open Access
162 Views
5 Pages

(E)-8-(4-(4-(Diphenylamino)styryl)phenoxy)-N,N,N-trimethyloctan-1-aminium Bromide

  • Saiya Yang,
  • Ya-Na Wang,
  • Yuyang Ma,
  • Ruirui Li,
  • Maxwell Ampomah-Wireko,
  • Cedric Dzidzor Kodjo Amengor,
  • En Zhang and
  • Yi-Hong Zhao

3 December 2025

Structural optimization integrating triphenylamine and quaternary ammonium salt-based antimicrobial peptide mimics has yielded novel theranostic hybrid molecules. These compounds exhibit fluorescence imaging, photodynamic antibacterial activity, and...

  • Short Note
  • Open Access
177 Views
4 Pages

(Z)-N-Carbamothioyl-4-hydroxy-2-oxo-4-(p-tolyl)but-3-enamide

  • Alexandra O. Derevnina,
  • Yurii V. Shklyaev and
  • Andrey N. Maslivets

2 December 2025

The reaction of 5-(p-tolyl)furan-2,3-dione with thiourea in a 1:1 ratio when refluxed in 1,4-dioxane gives (Z)-N-carbamothioyl-4-hydroxy-2-oxo-4-(p-tolyl)but-3-enamide with a good yield. This compound was fully characterized.

  • Short Note
  • Open Access
184 Views
7 Pages

2 December 2025

Heterocyclic systems such as 1,2,4-triazoles and piperazines play an important role in modern medicinal chemistry due to their structural diversity and broad spectrum of biological activities. In this Short Note, we report the synthesis and spectrosc...

  • Short Note
  • Open Access
181 Views
7 Pages

(7aR*,7bR*)-7a,7b-Dihydro-15H-dibenzo[f,f′]cyclopenta[1,2-b:5,4-b′]dichromene

  • Dmitry V. Osipov,
  • Oleg P. Demidov and
  • Vitaly A. Osyanin

27 November 2025

The reaction of a 2-naphthol-derived Mannich base with the push-pull 5-morpholinopenta-2,4-dienal under acidic conditions unexpectedly afforded (7aR*,7bR*)-7a,7b-dihydro-15H-dibenzo[f,f′]cyclopenta[1,2-b:5,4-b′]dichromene. The structure o...

  • Communication
  • Open Access
251 Views
4 Pages

21 November 2025

In the present study, (E)-1-(2-(pyridin-2-yl)benzo[d]thiazol-6-yl)-3-(3,4,5-trimethoxyphenyl)prop-2-en-1-one (4) was designed and synthesized via a three-step reaction sequence. Initially, 6-acetylbenzo[d]thiazol-2(3H)-one (1) was hydrolyzed to the c...

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Molbank - ISSN 1422-8599