dibromide as new oligoarene compounds. The structures and properties of these oligomers were investigated by NMR and electronic spectroscopy. Conformational analyses with the aid of DFT calculations revealed that each biaryl axis adopted a nearly perpendicular conformation, and the trimers and tetramers existed as a mixture of diastereomeric conformers.
由 10-mesitylanthracene-1,8-diyl 单元组成的低聚物通过 Ni 介导的相应二溴化物偶联合成,作为新的低聚芳烃化合物。通过核磁共振和电子光谱研究了这些低聚物的结构和性质。借助 DFT 计算的构象分析表明,每个联芳基轴都采用几乎垂直的构象,并且三聚体和四聚体以非对映异构体的混合物形式存在。
Enantioselective preparation and structural and conformational analysis of the chiral solvating agent α,α′-bis(trifluoromethyl)-1,8-anthracenedimethanol
The preparation of the enantiomers of α,α′-bis(trifluoromethyl)-1,8-anthracenedimethanol is described, and their conformational behaviour studied. These enantiomers are very active when used as chiralsolvatingagents in the presence of several compounds.
Catalytic Enantioselective Cycloaddition Transformation of Tricyclic Arenes Enabled by a Dual-Role Chiral Cage-Reactor
作者:Jie Chen、Xiantao Wu、Sisi Huang、Jie Yang、Yu-Lin Lu、Zhiwei Jiao、Cheng-Yong Su
DOI:10.1021/acscatal.3c06361
日期:2024.3.1
under mild conditions. The stereochemical outcome of the transformation was dictated by the adequate host–guest interactions, of which the noncovalent π–π stacking and electrostatic interactions act as the dominant control forces. This dual-role catalytic system with amphoteric properties provides an unconventional platform for the asymmetric D–A reactions of polyaromatic compounds, showing the promise
Extended Hypervalent 5c−6e Interactions: Linear Alignment of Five C−Se---O---Se−C Atoms in Anthraquinone and 9-Methoxyanthracene Bearing Arylselanyl Groups at the 1,8-Positions
作者:Warô Nakanishi、Satoko Hayashi、Norio Itoh
DOI:10.1021/jo035393+
日期:2004.3.1
(both typeB) and the phenyl planes are perpendicular to the anthraquinone plane. The structure around the Se atoms in 2a is very close to that of 1a: the conformations of the PhSe groups are both typeB. Consequently, the five Ci−Se- - -O- - -Se−Ci atoms in 1a and 2a align linearly. The nonbonded Se- - -O distances in 1a and 2a are 2.673−2.688 and 2.731−2.744 Å, respectively, which are about 0.7 Å
通过X-确定1,8-双(苯基硒基)蒽醌(1a),1,8-双(苯基硒基)-9-甲氧基蒽(2a)和1,8-双(苯基硒基)蒽(3a)的结构。射线晶体学分析及其衍生物。1a中的Se- Ci(Ph)键位于蒽醌平面(均为B型)上,而苯基平面垂直于蒽醌平面。2a中Se原子周围的结构非常接近1a:PhSe基团的构型均为B型。因此,五个C i - Se---O---Se-C i1a和2a中的原子线性排列。1a和2a中的非键合Se---O距离分别为2.673-2.688和2.731-2.744Å,比原子的范德华半径之和短约0.7Å。强烈建议将扩展的超价σ*(C i - Se)---n p(O)--- σ*(Se-C i)5c-6e相互作用作为1a中五个原子线性排列的起点和2a。在图5c-6E必须由两个超价n的连接来构建p - -σ*(SE-C - (O)我)3C-4E的相互作用通过中央Ñ p(O)。五个C i
Selective Stepwise Suzuki Cross-Coupling Reaction for the Modelling of Photosynthetic Donor−Acceptor Systems
作者:Mikhail A. Filatov、Roger Guilard、Pierre D. Harvey
DOI:10.1021/ol902614k
日期:2010.1.1
A Suzuki reaction performed as a selective stepwise substitution of two boryl groups on a diarylporphyrin precursor is reported for straightforward construction of a porphyrin trimer, modeling photosynthetic donor-acceptor systems.