- B2N2-Dibenzo[a,e]pentalenes: Effect of the BN Orientation Pattern on Antiaromaticity and Optoelectronic Properties
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Two BN units were embedded in dibenzo[a,e]pentalene with different orientation patterns, which significantly modulated its antiaromaticity and optoelectronic properties. Importantly, the vital role of the BN orientation in conjugated molecules with more t
- Wang, Xiao-Ye,Narita, Akimitsu,Feng, Xinliang,Müllen, Klaus
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- Visible-Light-Promoted Diboron-Mediated Transfer Hydrogenation of Azobenzenes to Hydrazobenzenes
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A visible-light-promoted transfer hydrogenation of azobenzenes has been developed. In the presence of B2pin2 and upon visible-light irradiation, the reactions proceeded smoothly in methanol at ambient temperature. The azobenzenes with diverse functional groups have been reduced to the corresponding hydrazobenzenes with a yield of up to 96%. Preliminary mechanistic studies indicated that the hydrogen atom comes from the solvent and the transformation is achieved through a radical pathway.
- Song, Menghui,Zhou, Hongyan,Wang, Ganggang,Ma, Ben,Jiang, Yajing,Yang, Jingya,Huo, Congde,Wang, Xi-Cun
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p. 4804 - 4811
(2021/04/06)
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- Visible-light-promoted decarboxylative addition cyclization of: N -aryl glycines and azobenzenes to access 1,2,4-triazolidines
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Methods for the synthesis of 1,2,4-triazolidines are scarce. Herein, we report a visible-light-promoted decarboxylative addition cyclization of N-aryl glycines and azobenzenes to access such important compounds. Using commercially available methylene blue (MB) as an organic photocatalyst, the reaction proceeded smoothly in the absence of transition-metal catalysts at ambient temperature, affording the corresponding products, 1,2,4-triaryl 1,2,4-triazolidines, in good to excellent yields. This work demonstrates a new synthetic application of readily available azobenenes and provides a novel strategy for constructing 1,2,4-triazolidines.
- Ma, Ben,Qi, Yanfang,Song, Menghui,Wang, Xi-Cun,Yang, Jingya,Zhou, Hongyan
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supporting information
p. 5806 - 5811
(2021/08/23)
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- Host polymorphs and crystalline host-guest complexes of 3,3′-bis(9-hydroxy-9-fluorenyl)biphenyl
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The diol host compound 2 featuring a structure with two 9-fluorenol moieties attached in 3,3′-position to a biphenyl core unit has been synthesized and is shown to form crystalline inclusion complexes with organic guest molecules. Aside from the single-crystal X-ray structures of unsolvated 2 in two polymorphous forms (2A, 2B), structures of five inclusion compounds with 1,4-dioxane (2a), DMSO (2b), diethylamine (2c), acetic acid (2d), and ethyl acetate (2e) are described and comparatively discussed in the interaction behavior including corresponding host compounds with different attachment mode of the biphenyl unit and the diphenylhydroxymethyl-substituted equivalent.
- Skobridis, Konstantinos,Theodorou, Vassiliki,Seichter, Wilhelm,Weber, Edwin
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p. 3985 - 3995
(2013/09/24)
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- Tin-mediated reduction of azoarenes to hydrazoarenes using hydrazine hydrate
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The controlled reduction of azoarenes to the corresponding hydrazoarenes using tin and hydrazine hydrate is reported. The reduction proceeds smoothly at room temperature furnishing the hydrazoarene in excellent yield without the formation of an aniline.
- Dinesh,Abiraj,Srinivasa,Gowda, D. Channe
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p. 422 - 423
(2007/10/03)
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- Ammonium chloride mediated reduction of azo compounds to hydrazo compounds
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The reduction of azo compounds with magnesium powder as catalyst in the presence of ammonium chloride at room temperature in methanol leads to hydrazo compounds.
- Sridhara,Srinivasa,Gowda, D. Channe
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