Tetrakis(t-butyl)tetraborane(4), Bu4 tB4; synthesis of the first peralkyl derivative of a 2N framework electron count deltahedral borane

Davan, T.; Morrison, John A.

doi:10.1039/c39810000250

Cited by 33 publications

(11 citation statements)

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“…27,28 Alternatively, B 4 R n Cl 4-n (n = 1, 2, 4) analogues have been synthesized through treatment of the halogenated B 4 Cl 4 cluster with alkyllithium reagents. 29,30 The reactivity of B 4 Cl 4 has been described by Morrison and is summarized in Fig. 2.…”

Section: Synthesis Of Perfunctionalized Boron Clustersmentioning

confidence: 99%

Synthesis and Applications of Perfunctionalized Boron Clusters

et al. 2018

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This Viewpoint Article describes major advances pertaining to perfunctionalized boron clusters in synthesis and their respective applications. The first portion of this work highlights key synthetic methods allowing one to access a wide range of polyhedral boranes (B4 and B6 – B12 cluster cores) that contain exhaustively functionalized vertices. The second portion of this Viewpoint showcases the historical developments in using these molecules for applications ranging from materials science to medicine. Lastly, we suggest potential new directions for these clusters as they apply to both synthetic methods and applications.

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Section: Synthesis Of Perfunctionalized Boron Clustersmentioning

confidence: 99%

Synthesis and Applications of Perfunctionalized Boron Clusters

et al. 2018

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“…c) Synthesis of a(B 4 H 4 ) 2À derivative by Berndt and co-workers( see Ref. boratetrahedrane), [72,73] B 4 (tBu) 2 (CH 2 tBu) 2 , [66] and B 4 (tmp) 4 (tmp = 2,2,6,6-tetramethylpiperidino). boratetrahedrane), [72,73] B 4 (tBu) 2 (CH 2 tBu) 2 , [66] and B 4 (tmp) 4 (tmp = 2,2,6,6-tetramethylpiperidino).…”

Section: Electron-deficient B 4 Rings With Six or More Skeletal Electmentioning

confidence: 99%

Electron‐Deficient Triborane and Tetraborane Ring Compounds: Synthesis, Structure, and Bonding

Himmel

2019

Angew Chem Int Ed

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Electron‐deficient small boron rings are unique in their formation of σ‐ and π‐delocalized electron systems as well as the avoidance of “classical” structures with two‐center‐two‐electron (2c,2e) bonds. These rings are tolerant of several skeletal electron numbers, which makes their redox chemistry highly interesting. In the past few decades, a range of stable compounds have been synthesized with various electron numbers in their B3 and B4 cores. The electronic structures were evaluated by quantum‐chemical calculations. On the other hand, the chemistry of these rings is still very much underdeveloped, being generally limited to the protonation and redox reactions of individual systems. The linkage of several B3 and/or B4 ring systems should give compounds with attractive electronic properties, thus leading the way to novel boron‐based materials. By summarizing important experimental and theoretical results, this Review intends to provide the basis for the exploration of the chemistry of these rings and, in particular, their integration into larger molecular architectures.

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“…Geburtstag gewidmet Die Chlor- [1] und tert-Butyl-Derivate [2,3] des Tetraborans(4) 1 haben eine Tetrahedran-Struktur (B-B (1 b): 1.699(6) ± 1.714(4) ), [3] während in Lösung für B 4 Cl 4 1 a [4 ,5] und B 4 Br 4 [6] eine Öffnung des Tetraeders zum entsprechenden Vierring 2 diskutiert wird. In einer aus Di-tert-butyldichlordiboran(4) und Na/K-Legierung erhaltenen Reaktionslösung konnten Klusik und Berndt [7] die Bildung von 1 b ( 11 B-NMR: d 135.7) und ESR-spektroskopisch das Radikalanion [B 4 (CMe 3 ) 4 ] .À (2 b .À ) nachweisen, für das sie eine gefaltete Ringstruktur postulierten.…”

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“…Diese Substanzen, deren absolute Konfiguration unbekannt ist und die aus einer nicht identifizierten Pilzart durch eine Arbeitsgruppe bei Pfizer (Croton, USA) isoliert wurden, [1] zeichnen sich durch ihre beeindruckenden, auf Inhibierung der Squalen-Synthase beruhenden Cholesterinspiegel-senkenden Eigenschaften aus. [1,2] Ferner inhibieren sie die Farnesyl-Transferase, ein Enzym, das am Wachstum von Krebs beteiligt ist. Sie sind damit als Kanditaten für ein potentielles Medikament in der Krebs-Chemotherapie interessant.…”

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