Boron-Containing Coumarins (Review)

Las’kova, Yu. N.; Serdyukov, A. A.; Sivaev, I. B.

doi:10.1134/s0036023623600612

Cited by 12 publications

(4 citation statements)

References 95 publications

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“…[22][23][24][25][26][27] Based on the ring opening process, it is possible to create complex organic-inorganic systems in which a boron cluster is attached through a chain of four or five CH 2 groups to organic platforms such as porphyrins, phthalocyanines, calixarenes, coumarins and sterols. [28][29][30] Carboxonium derivatives of boron clusters have received less attention than oxonium derivatives, but derivatives of cobalt bis(dicarbollide) and closo-decaborate anions have been described. 31,32 The authors' research group has focused mainly on the closo-decaborate anion.…”

Section: Introductionmentioning

confidence: 99%

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Carboxonium derivatives based on closo-dodecaborate anions [1,2-B₁₂H₁₀O₂CR]⁻: synthesis and molecular orbital analysis

Kolbunova,

Klyukin,

Novikov

et al. 2024

New J. Chem.

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Section: Introductionmentioning

confidence: 99%

“…22–27 Based on the ring opening process, it is possible to create complex organic–inorganic systems in which a boron cluster is attached through a chain of four or five CH 2 groups to organic platforms such as porphyrins, phthalocyanines, calixarenes, coumarins and sterols. 28–30…”

Section: Introductionmentioning

confidence: 99%

Carboxonium derivatives based on closo-dodecaborate anions [1,2-B₁₂H₁₀O₂CR]⁻: synthesis and molecular orbital analysis

Kolbunova,

Klyukin,

Novikov

et al. 2024

New J. Chem.

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“…Among oxygen-type ligands, coumarins and their derivatives have stimulated interesting research due to their several properties [11][12][13][14]. Coumarins belong to a family of natural and synthetic compounds containing a heterocycle of fused benzene and α-pyrone rings as their core structure.…”

Section: Introductionmentioning

confidence: 99%

Insights on Stability Constants and Structures of Complexes between Coumarin Derivatives and Pb(II) in Aqueous Media

Furia,

Lettera,

Napoli

et al. 2024

Molecules

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In the frame of a systematic study on the sequestering ability of natural antioxidants towards metal cations, here the complexation of coumarin-3-carboxilic acid (HCCA) with Pb(II) and the overall stability constants of the resulting complexes, at 37 °C and in 0.16 M NaClO4, are discussed. Reaction of Pb(ClO4)2 with HCCA in an aqueous medium at a pH range from 2 to 6 and various ratios (1:1–1:10) yielded the Pb–CCA complexes, which were characterized spectrometrically by laser desorption ionization mass spectrometry (LD-MS). LD-MS has provided the composition and structure of Pb–CCA species according to the speciation model proposed on the basis of the potentiometric data. The graphic representation of the complex’s concentration curves is given by the distribution diagram, which provides a whole depiction of the species present in the solution at the selected pH ranges.

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“…Boron cluster anions [B n H n ] 2− (n = 6-12) attract attention as completely inorganic clusters with high resistance to elevated temperatures and oxidizing agents, but at the same time are quite easily subjected to direct functionalization due to the substitution of terminal hydrogen atoms with various functional groups [1][2][3][4][5]. The derivatives obtained can be used in further modification reactions, for example, due to the presence of thiol [6][7][8][9], nitrile [10][11][12], hydroxyl [13][14][15], and other groups.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Structures of Lead(II) Complexes with Substituted Derivatives of the Closo-Decaborate Anion with a Pendant N3 Group

Matveev,

Dontsova,

Avdeeva

et al. 2023

Molecules

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In this work, we studied lead(II) and cobalt(II) complexation of derivatives [2-B10H9O(CH2)2O(CH2)2N3]2− and [2-B10H9O(CH2)5N3]2− of the closo-decaborate anion containing pendant azido groups in the presence of 1,10-phenanthroline and 2,2′-bipyridyl. Mononuclear [PbL2{An}] and binuclear [Pb2L4(NO3)2{An}] lead complexes (where {An} is the N3-substituted boron cluster) were isolated and studied by IR spectroscopy and elemental analysis. The mononuclear lead(II) complex [Pb(phen)2[B10H9O(CH2)2O(CH2)2N3] and the binuclear lead(II) complex [Pb2(phen)4(NO3)2[B10H9O(CH2)5)N3] were determined by single-crystal X-ray diffraction. In complex [Pb2(phen)4(NO3)2[B10H9O(CH2)5)N3], the boron cluster is coordinated by the metal atom only via the 3c2e MHB bonds. In complex [Pb(phen)2[B10H9O(CH2)2O(CH2)2N3], the coordination environment of the metal includes BH groups of the boron cluster and the oxygen atom of the exo-polyhedral substituent. When the reaction was performed in a CH3CN/water mixture, the binuclear lead(II) complex [(Pb(bipy)NO3)(Pb(bipy)2NO3)(B10H9O(CH2)2O(CH2)2N3)]·CH3CN·H2O was isolated, where the boron cluster acts as a bridging ligand between lead atoms coordinated by the boron cage via the O atoms of the substituent and/or the BH groups. In the course of cobalt(II) complexation, the starting compound (Ph4P)2[B10H9O(CH2)5N3] was isolated and its structure was also determined by X-ray diffraction. Although a number of lead(II) complexes with coordinated N3 are known from the literature, no complexes with the boron cluster coordinated by the pendant N3 group involved in the metal coordination have been isolated.

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Boron-Containing Coumarins (Review)

Cited by 12 publications

References 95 publications

Carboxonium derivatives based on closo-dodecaborate anions [1,2-B₁₂H₁₀O₂CR]⁻: synthesis and molecular orbital analysis

Carboxonium derivatives based on closo-dodecaborate anions [1,2-B₁₂H₁₀O₂CR]⁻: synthesis and molecular orbital analysis

Insights on Stability Constants and Structures of Complexes between Coumarin Derivatives and Pb(II) in Aqueous Media

Synthesis and Structures of Lead(II) Complexes with Substituted Derivatives of the Closo-Decaborate Anion with a Pendant N3 Group

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Boron-Containing Coumarins (Review)

Cited by 12 publications

References 95 publications

Carboxonium derivatives based on closo-dodecaborate anions [1,2-B12H10O2CR]−: synthesis and molecular orbital analysis

Carboxonium derivatives based on closo-dodecaborate anions [1,2-B12H10O2CR]−: synthesis and molecular orbital analysis

Insights on Stability Constants and Structures of Complexes between Coumarin Derivatives and Pb(II) in Aqueous Media

Synthesis and Structures of Lead(II) Complexes with Substituted Derivatives of the Closo-Decaborate Anion with a Pendant N3 Group

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Carboxonium derivatives based on closo-dodecaborate anions [1,2-B₁₂H₁₀O₂CR]⁻: synthesis and molecular orbital analysis

Carboxonium derivatives based on closo-dodecaborate anions [1,2-B₁₂H₁₀O₂CR]⁻: synthesis and molecular orbital analysis