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Molbank, Volume 2024, Issue 4

December 2024 - 58 articles

Cover Story: The biomass derivative levoglucosenone and its reduced form Cyrene, which are obtained from the acid-catalyzed pyrolysis of cellulose, have emerged as promising chiral platform chemicals in materials chemistry and building blocks for the production of pharmaceuticals or natural products. Reports of fluorinated derivatives are limited; however, the incorporation of fluorine could be beneficial for the enantioselective synthesis of pharmaceuticals and natural products. We report a one-carbon difluorocyclopropanation/ring-expansion of Cyrene. The ring-enlargement was achieved by converting Cyrene into an enamine, reacting it with an in situ generated difluorocarbene, and then heating to open the cyclopropane ring. Access to the product provides access to a novel fluorinated analogue of this important chiral biomass pyrolysis product. View this paper
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Articles (58)

  • Short Note
  • Open Access
1,191 Views
4 Pages

Bis(1,1,1,3,3,3-hexafluoropropan-2-yl) [1,1′-biphenyl]-4,4′-dicarboxylate

  • Ethan T. Mercier,
  • Manisha Sharma,
  • Adam M. Graichen and
  • Nicholas E. Leadbeater

20 December 2024

The oxidative esterification of 4,4′-Biphenyldicarboxaldehyde with hexafluoroisopropanol is reported. The methodology, making a novel hexafluoroisopropyl ester uses a green, recyclable oxoammonium salt along with easily obtained sodium persulfate.

  • Short Note
  • Open Access
1,498 Views
4 Pages

19 December 2024

The titular compound, 6-amino-7-((4-methoxybenzyl)thio)quinazolin-4(3H)-one, was prepared from 7-fluoro-6-nitroquinazolin-4(3H)-one via a nucleophilic aromatic substitution reaction followed by a reduction of the nitro group. Characterization of the...

  • Short Note
  • Open Access
1,504 Views
3 Pages

5-Bromo-N′-(2-oxoindolin-3-ylidene)furan-2-carbohydrazide

  • Nur Pasca Aijijiyah,
  • Arif Fadlan,
  • Sri Ningsih and
  • Mardi Santoso

19 December 2024

5-Bromo-N′-(2-oxoindolin-3-ylidene)furan-2-carbohydrazide (1) was successfully synthesized in 79.4% yield by reaction of isatin with 5-bromofuran-2-carbohydrazide in acidic conditions under reflux. The structure of synthesized compound 1 was co...

  • Short Note
  • Open Access
1,115 Views
8 Pages

3-(4-Ferrocenyl-1H-1,2,3-triazol-1-yl)cholic Acid

  • Valeria D’Annibale,
  • Venanzio Raglione,
  • Francesco Lisi,
  • Elisa Verdirosi,
  • Lorenza Romagnoli,
  • Danilo Dini,
  • Luciano Galantini and
  • Andrea D’Annibale

19 December 2024

Surfactants are very important compounds that are ubiquitous in biological systems and detergents. Among them, ferrocene surfactants are a very valuable class of stimuli-responsive materials since the presence of ferrocene moiety discloses the chance...

  • Communication
  • Open Access
1,588 Views
6 Pages

Ethyl 4H-Pyran-4-one-2-carboxylate

  • R. Alan Aitken,
  • Alexander J. B. Nelson and
  • Alexandra M. Z. Slawin

16 December 2024

The title compound was characterised for the first time by 13C NMR, including the determination of CH coupling constants, and its X-ray structure was determined, showing double ribbons of molecules in the crystal held together by weak CH to O=C hydro...

  • Short Note
  • Open Access
1 Citations
2,552 Views
5 Pages

(E)-1-(Benzo[d][1,3]dioxol-5-yl)-5,6,6-trimethylhept-4-en-3-one

  • Mario Rico-Molina,
  • Joaquín Altarejos and
  • Sofía Salido

11 December 2024

The title compound (1) was obtained within a project to synthesize analogs of the antiepileptic drug stiripentol. Compound 1 was synthesized by aldol addition of the lithium enolate of 4-(benzo[d][1,3]dioxol-5-yl)butan-2-one (2) to 3,3-dimethylbutan-...

  • Short Note
  • Open Access
1 Citations
1,249 Views
5 Pages

5,10-Diiododibenzo[a,e]pentalene

  • Natsumi Ohara,
  • Chinatsu Ogiwara and
  • Takuya Kuwabara

10 December 2024

The crystal structure and the improved synthesis of the title compound (1) are presented. Treatment of 5,10-disilyldibenzo[a,e]pentalenes (2a and 2b) with iodine chloride (ICl) readily provided 1 in good yields. Recrystallization from a dichlorometha...

  • Communication
  • Open Access
1 Citations
1,274 Views
6 Pages

10 December 2024

3-N-allylrhodanine was condensed with 5-(4-methoxyphenyl)-thiophene-2-carbaldehyde in an L-proline-based deep eutectic solvent (DES) to obtain the π-conjugated heterocyclic rhodanine compound (5Z)-3-allyl-5-{[5-(4-methoxyphenyl)thiophen-2-yl]methy...

  • Communication
  • Open Access
2 Citations
2,045 Views
12 Pages

7 December 2024

New cyclotriphosphazene derivatives featuring amide–Schiff base linkages with a hydrazine bridge and different terminal ends, such as decyl alkyl chains and hydroxy groups, were successfully synthesized and characterized. Fourier-transform infr...

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Molbank - ISSN 1422-8599