Protecting Group-Free Synthesis of 1,2-Azaborines: A Simple Approach to the Construction of BN-Benzenoids
摘要:
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.
作者:Adam J. V. Marwitz、Myrna H. Matus、Lev N. Zakharov、David A. Dixon、Shih-Yuan Liu
DOI:10.1002/anie.200805554
日期:2009.1.19
It isn't easy BN aromatic! 1,2‐Dihydro‐1,2‐azaborine, a hybridorganic/inorganicbenzene, is a stable aromatic molecule with features that are distinct from its isoelectronic “organic” (benzene) and “inorganic” (borazine) counterparts. Experimental structural, spectroscopic, and chemical data are fully supported by high‐level calculations.
Late-Stage Functionalization of 1,2-Dihydro-1,2-azaborines via Regioselective Iridium-Catalyzed C–H Borylation: The Development of a New N,N-Bidentate Ligand Scaffold
作者:Andrew W. Baggett、Monica Vasiliu、Bo Li、David A. Dixon、Shih-Yuan Liu
DOI:10.1021/jacs.5b01916
日期:2015.4.29
bromides furnishes 1,2-azaborine-based biaryl compounds including 6-[pyrid-2-yl]-1,2-azaborines that represent novel κ(2)-N,N-bidentate ligands. The 6-[pyrid-2-yl]-B-Me-1,2-azaborine ligand has been demonstrated to form an emissive coordination complex with dimesitylboron that exhibits bathochromically shifted absorption and emission maxima and a higher photoluminescence quantum yield compared to its
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.
AZABORINE COMPOUNDS AS HYDROGEN STORAGE SUBSTRATES
申请人:Liu Shih-Yuan
公开号:US20110021818A1
公开(公告)日:2011-01-27
Selected 1,2-azaborine compounds exhibit utility as hydrogen storage substrates, and are useful as components of hydrogen storage devices.
选定的1,2-氮硼杂环化合物可作为储氢底物,并可用作储氢装置的组成部分。
Microwave Spectrum, Structural Parameters, and Quadrupole Coupling for 1,2-Dihydro-1,2-azaborine
作者:Adam M. Daly、Chakree Tanjaroon、Adam J. V. Marwitz、Shih-Yuan Liu、Stephen G. Kukolich
DOI:10.1021/ja1005338
日期:2010.4.21
determine most of the important structuralparameters for this molecule. The spectra were obtained using a pulsed beam Fourier transform microwave spectrometer, with sufficient resolution to allow accurate measurements of (14)N, (11)B, and (10)B nuclear quadrupole hyperfine interactions. High-level ab initio calculations provided structuralparameters and quadrupolecoupling strengths that are in very good
已在 7-18 GHz 频率范围内测量了 1,2-二氢-1,2-氮杂硼的第一个微波光谱,为三种同位素 H(6)C(4) 提供准确的旋转常数和氮和硼四极杆耦合强度)(11)B(14)N、H(6)C(4)(10)B(14)N 和 H(5)DC(4)(11)B(14)N。测量的旋转常数用于准确确定取代原子的坐标,并提供足够的数据来确定该分子的大多数重要结构参数。光谱是使用脉冲束傅里叶变换微波光谱仪获得的,具有足够的分辨率以允许准确测量 (14)N、(11)B 和 (10)B 核四极杆超精细相互作用。高级从头算计算提供了与测量值非常一致的结构参数和四极耦合强度。母体化合物的旋转常数为 A = 5657.335(1)、B = 5349.2807(5) 和 C = 2749.1281(4) MHz,从而产生地面惯性缺陷 Delta(0) = 0.02 amu x A(2) -状态结构。观察到的接近零和正惯性缺陷清楚地表明