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Journal Article 4

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2020 3

2015 1

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heterocycles 2

2D layered structure 1

Claisen rearrangement 1

Energetic materials 1

Fused heterocycles 1

High energy 1

Stability Sensitivity 1

alkynes 1

allylation 1

blue emitters 1

carbon nano-onions 1

fluorescence 1

fluoroalcohol 1

gold 1

hypervalent iodine 1

isoquinolines 1

multicomponent reactions 1

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Easy access to pharmaceutically relevant heterocycles by catalytic reactions involving

Ximei Zhao, Matthias Rudolph, Abdullah M. Asiri, A. Stephen K. Hashmi

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 3,   Pages 317-349 doi: 10.1007/s11705-019-1874-4

Abstract: summarizes recent advances in the field of gold-catalyzed synthesis of pharmaceutically relevant aza-heterocycles

Keywords： gold     heterocycles     alkynes    

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Diversity-oriented synthesis of blue emissive nitrogen heterocycles and their conjugation with carbon

Viviana Maffeis, Lisa Moni, Daniele Di Stefano, Silvia Giordani, Renata Riva

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 1,   Pages 76-89 doi: 10.1007/s11705-019-1833-0

Abstract: The search for new fluorescent molecules for possible applications as functional -electron systems and their conjugation with different nanomaterials is nowadays of paramount importance to broaden the availability of materials with different properties. Herein we present a diversity-oriented approach to heterocyclic luminophores based on a multicomponent Ugi reaction followed by a Pd-mediated cascade sequence. The new molecules are coupled to carbon nano-onions, and hybrid systems represent the first example of blue emitters conjugated with these carbon nanoparticles.

Keywords： carbon nano-onions     multicomponent reactions     blue emitters     fluorescence     isoquinolines    

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Fluoroalcohol-mediated reductive iodonio-Claisen rearrangement: Synthesis of complex

Hem Raj Khatri,Hai Nguyen,James K. Dunaway,Jianglong Zhu

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 3,   Pages 359-368 doi: 10.1007/s11705-015-1530-6

Abstract: Reductive iodonio-Claisen rearrangement (RICR) involving -iodanes and allyl or substituted-allyl silanes in fluoroalcohols, such as 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) and 2,2,2-trifluoroethanol (TFE), was studied for the synthesis of complex -allyl or substituted-allyl iodoarenes. In comparison to the previously reported condition involving boron trifluoride diethyl etherate, the RICR mediated by fluoroalcohols was found to proceed more effectively. The resulting complex -allyl iodoarenes are useful synthetic intermediates and can be readily converted to various heterocyclic compounds.

Keywords： hypervalent iodine     allylation     fluoroalcohol     Claisen rearrangement     heterocycles    

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Construction of an Unusual Two-Dimensional Layered Structure for Fused-Ring Energetic Materials with High Energy and Good Stability Article

Yongan Feng, Mucong Deng, Siwei Song, Sitong Chen, Qinghua Zhang, Jean’ne M. Shreeve

Engineering 2020, Volume 6, Issue 9,   Pages 1006-1012 doi: 10.1016/j.eng.2020.01.013

Abstract:

The creation of high-performance energetic materials with good mechanical sensitivities has been a great challenge over the past decades, since such materials have huge amounts of energy and are thus essentially unstable. Here, we report on a promising fused-ring energetic material with an unusual twodimensional (2D) structure, 4-nitro-7-azido-pyrazol-[3,4-d]-1,2,3 triazine-2-oxide (NAPTO), whose unique 2D structure has been confirmed by single-crystal X-ray diffraction. Experimental studies show that this novel energetic compound has remarkably high energy (detonation velocity D = 9.12 km∙s−1; detonation pressure P = 35.1 GPa), excellent sensitivities toward external stimuli (impact sensitivity IS = 18 J; friction sensitivity FS = 325 N; electrostatic discharge sensitivity EDS = 0.32 J) and a high thermal decomposition temperature (203.2 °C), thus possessing the dual advantages of high energy and low mechanical sensitivities. To our knowledge, NAPTO is the first fused-ring energetic material with 2D layered crystal stacking. The stabilization mechanism toward external stimuli were investigated using molecular simulations, and the theoretical calculation results demonstrate that the ultraflat 2D layered structure can buffer external mechanical stimuli more effectively than other structures by converting the mechanical energy acting on the material into layer sliding and compression. Our study reveals the great promise of the fused-ring 2D layered structure for creating advanced energetic materials.

Keywords： Energetic materials     Fused heterocycles     2D layered structure     High energy     Stability Sensitivity    

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Title Author Date Type Operation

Easy access to pharmaceutically relevant heterocycles by catalytic reactions involving

Ximei Zhao, Matthias Rudolph, Abdullah M. Asiri, A. Stephen K. Hashmi

Journal Article

Diversity-oriented synthesis of blue emissive nitrogen heterocycles and their conjugation with carbon

Viviana Maffeis, Lisa Moni, Daniele Di Stefano, Silvia Giordani, Renata Riva

Journal Article

Fluoroalcohol-mediated reductive iodonio-Claisen rearrangement: Synthesis of complex

Hem Raj Khatri,Hai Nguyen,James K. Dunaway,Jianglong Zhu

Journal Article

Construction of an Unusual Two-Dimensional Layered Structure for Fused-Ring Energetic Materials with High Energy and Good Stability

Yongan Feng, Mucong Deng, Siwei Song, Sitong Chen, Qinghua Zhang, Jean’ne M. Shreeve

Journal Article