The ligand properties of 2-vinyl-1,2-azaboratabenzene
摘要:
Lithium 2-vinyl-1,2-azaboratabenzene 1b has been prepared by a multistep synthesis from 2,2-dibutyl-2,5-dihydro-1-trimethylsilyl-1H-1,2-azastannole 6. The reaction of 1b with one equivalent of [Cp*RuCl](4) gave the very labile sandwich compound 11. However, the reaction of 1b with 2 equiv. of [Cp*RuCl](4) afforded the stable diruthenium complex 12. The X-ray structure of 12 shows that the first Cp*Ru moiety is pi-bound to the 1,2-azaboratabenzene ring while the second is bound to Cl and to the nitrogen and the pendant B-vinyl of the 1,2-azaboratabenzene group. (C) 2008 Elsevier B.V. All rights reserved.
Nucleophilic Aromatic Substitution Reactions of 1,2-Dihydro-1,2-Azaborine
作者:Ashley N. Lamm、Edward B. Garner、David A. Dixon、Shih-Yuan Liu
DOI:10.1002/anie.201103192
日期:2011.8.22
Could go either way: The addition of nucleophiles to the parent 1,2‐dihydro‐1,2‐azaborine and subsequent quenching with an electrophile generates novel substituted1,2‐azaborine derivatives (see scheme). Mechanistic studies are consistent with two distinct nucleophilic aromatic substitution pathways depending on the nature of the nucleophile.
Synthesis by free radical polymerization and properties of BN-polystyrene and BN-poly(vinylbiphenyl)
作者:Wen-Ming Wan、Andrew W. Baggett、Fei Cheng、Huina Lin、Shih-Yuan Liu、Frieder Jäkle
DOI:10.1039/c6cc07332h
日期:——
Freeradical polymerization of B-vinyl- and B-styryl-functionalized azaborinine monomers gives organic-inorganic hybrid polymers with distinctly different materials properties compared to the corresponding carbonaceous polystyrene derivatives.
Protecting Group-Free Synthesis of 1,2-Azaborines: A Simple Approach to the Construction of BN-Benzenoids
作者:Eric R. Abbey、Ashley N. Lamm、Andrew W. Baggett、Lev N. Zakharov、Shih-Yuan Liu
DOI:10.1021/ja4073436
日期:2013.8.28
The protecting group-free synthesis of a versatile 1,2-azaborine synthon 5 is described. Previously inaccessible 1,2-azaborine derivatives, including the BN isostere of phenyl phenylacetate and BN1 triphenylmethane were prepared from 5 and characterized. The structural investigation of BN phenyl phenylacetate revealed the presence of a unique NH-carbonyl hydrogen bond that is not present in the corresponding carbonaceous analogue. The methyne CH in BN triphenylmethane was found to be less acidic than the corresponding proton in triphenylmethane. The gram-quantity synthesis of the parent 1,2-azaborine 4 was demonstrated, which enabled the characterization of its boiling point, density, refractive index, and its polarity on the E-T(30) scale.