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Electrochemical utilization of methanol and methanol-d4 as a C1 source to access(deuterated) 2,3-dihydroquinazolin-4(1H)-one

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Chinese chemical Letters 2022年第3期33卷 1559-1562页

作者： Mingzhu Liu Liang Xu Yu Wei school of chemistry and chemical engineering Key Laboratory for Green Processing of Chemical Engineering of Xinjiang BingtuanShihezi UniversityShihezi 832003China

Herein, an electrocatalytic protocol for the synthesis of 2,3-dihydroquinazolin-4(1H)-one has been disclosed. Methanol is activated and utilized as the C1 source to cyclize with 2-aminobenzamides.This cyclization reaction proceeds conveniently(room temperature and air atmosphere) without any homogeneous metal catalysts, external oxidants, or bases. A wide variety of N,N-disubstituted 2,3-dihydroquinazolin-4(1H)-ones are obtained via this approach. Moreover, when methanol-d4is used, a deuterated methylene motif is incorporated into the N-heterocycles, providing an efficient approach to the deuterated N-heterocycles.

关键词： Electrochemistry Heterocycles Dihydroquinazolinone Aminobenzamide C1 source

Process monitoring of the Au-S bond conversion in acetylene hydrochlorination

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Chinese Journal of chemical engineering 2022年第5期35卷 32-40页

作者： Lutai Song Li Liu Mingyuan Zhu Bin Dai school of chemistry and chemical engineering Shihezi UniversityShihezi 832000China key laboratory for green processing of chemical engineering of xinjiang bingtuan Shihezi 832000China

The continuous expansion of vinyl chloride production increases environmental pollution caused by mercury catalysts,which is an issue that urgently needs to be solved.green and stable catalysts should be researched to alleviate this issue.In this research,Thiolactic acid acts as a ligand where sulfhydryl groups form a stable complex with Au on the surface of a spherical activated carbon(SAC).An Au-thiolactic acid/SAC catalyst was designed with a Au theoretical loading of 0.5%(mass)to overcome the disadvantages of traditional Au-based catalysts,such as a low conversion rate and poor life cycle.The ratio of Au to ligand was screened,and the activity was best when Au/S=1:8.The formation of the Au-S bond was proven by FT-IR and UV-vis.The longevity test of the Au1 S8/SAC catalyst was carried out at 1200 h^(-1) for 50 h.Samples with reaction times of 0 h,5 h,10 h,20 h,and 50 h were taken to monitor the catalyst status.The XPS and TPR tests proved that the Au-S bond broke as the acetylene hydrochlorination reaction proceeded,The DFT calculation proved that the Au-S bond is the active site,and the sulfur atom promotes the adsorption of C_(2)H_(2) by the catalyst.

关键词： Acetylene hydrochlorination Au-S bond Process monitoring Valence shift

Synthesis of 9-phenol-substituted xanthenes by cascade O-insertion/1,6-conjugate addition of benzyne with ortho-hydroxyphenyl substituted para-quinone methides

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Chinese chemical Letters 2019年第2期30卷 386-388页

作者： Zhijuan Li Weihua Wang Hui Jian Wenjuan Li Bin Dai Lin He key laboratory for green processing of chemical engineering of xinjiang bingtuan School of Chemistry and Chemical EngineeringShihezi University

The cascade O-insertion/1,6 conjugate addition between benzynes and ortho-hydroxyphenyl substituted para-quinone methides has been reported, affording 9-phenol substituted xanthenes in 49%-84% yields.

关键词： Benzyne para-Quinone methides Xanthene Cascade reaction Cycloaddition

Dyes adsorption using a synthetic carboxymethyl cellulose-acrylic acid adsorbent

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Journal of Environmental Sciences 2014年第5期26卷 1203-1211页

作者： Genlin Zhang Lijuan Yi Hui Deng Ping Sun school of chemistry and chemical engineering Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan Shihezi University

Removal of noxious dyes is gaining public and technological attention. Herein grafting polymerization was employed to produce a novel adsorbent using acrylic acid and carboxymethyl cellulose for dye removal. Scanning electron microscopy and Fourier-transform infrared spectroscopy verified the adsorbent formed under optimized reaction conditions. The removal ratio of adsorbent to Methyl Orange, Disperse Blue 2BLN and malachite green chloride reached to 84.2%, 79.6% and 99.9%, respectively. The greater agreement between the calculated and experimental results suggested that pseudo second-order kinetic model better represents the kinetic adsorption data. Equilibrium adsorptions of dyes were better explained by the Temkin isotherm. The results implied that this new cellulose-based absorbent had the universaiity for removal of dyes through the chemical adsorption mechanism.

关键词： adsorption dye grafting polymerization carboxymethyl cellulose acrylic acid

Ni-Al mixed metal oxide with rich oxygen vacancies: CO methanation performance and density functional theory study

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Chinese Journal of chemical engineering 2022年第6期35卷 73-83页

作者： Zhouxin Chang Feng Yu Zhisong Liu Zijun Wang Jiangbing Li Bin Dai Jinli Zhang key laboratory for green processing of chemical engineering of xinjiang bingtuan School of Chemistry and Chemical EngineeringShihezi UniversityShihezi 832003China bingtuan Industrial Technology Research Institute Shihezi UniversityShihezi 832003China

Ni-Al mixed metal oxides have been successfully prepared by high shear mixer(HSM)and coprecipitation(CP)methods for low temperature CO methanation.In this work,Ni-Al(HSM-CP)catalyst presented small Ni crystallite size and high surface area,which all contribute to the methanation reaction at low temperature conditions.The obtained Ni-Al(HSM-CP)sample exhibited a mass of defective oxygen,thereby accelerating the dissociation of CO and ultimately increasing the activity of the catalyst.Ni-Al(HSM-CP)catalyst offered the best activity with CO conversion=100%and CH_(4) selectivity=93%at 300℃,and the CH_(4) selectivity can reach 81.8%at 200℃.In situ Fourier transform infrared spectroscopy and density functional theory show that CHO and COH intermediates with lower activation energy barriers are produced during the reaction,and hydrogen-assisted carbon–oxygen bond scission is more favorable.

关键词： Natural gas Carbon monoxide methanation High shear mixer Oxygen vacancy Homogeneous catalysis

Synthesis of Unsymmetrical 1,3-Diynes via Pd/Cu-Catalyzed Cross-Coupling of Terminal Alkynes at Room Temperature

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Chinese Journal of chemistry 2016年第9期34卷 895-900页

作者： Yashuai Liu Ping Liu Ningning Gu Jianwei Xie Yan Liu Bin Dai school of chemistry and chemical engineering the Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan Shihezi University Shihezi Xinjiang 832003 China

经由 PdCl/CuI 的不对称的 1,3-diynes 的灵巧、实际的合成线路催化二不同终端炔属羟的氧化联合的 A 被使用 3-(diphenylphosphino ) 开发了面对氧象 ligand 酸的 propanoic。这个系统是合适的因为不仅不仅芳香的炔属羟和被转变成相应... 详细信息

经由 PdCl/CuI 的不对称的 1,3-diynes 的灵巧、实际的合成线路催化二不同终端炔属羟的氧化联合的 A 被使用 3-(diphenylphosphino ) 开发了面对氧象 ligand 酸的 propanoic。这个系统是合适的因为不仅不仅芳香的炔属羟和被转变成相应不对称的 1,3-diynes 在的脂肪族的炔属羟在房间温度节制到好收益。而且，不对称的 1,3-diynes 也在多克规模上被获得。机械学的研究建议氧在催化周期起一个关键作用。

关键词：不对称的 1,3-diynes 钯 P， O ligand 终端炔属羟跨 coupling

Catalyst-free hydrochlorination protocol for terminal arylalkynes with hydrogen chloride

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Chinese chemical Letters 2016年第11期27卷 1683-1685页

作者： Cai-Xia Xu Cun-Hua Ma Fu-Rong Xiao Hong-Wei Chen Bin Dai school of chemistry and chemical engineering Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan

We present a simple and straightforward protocol for hydrochlorination of terminal arylalkynes to vinyl chlorides using hydrogen chloride under mild reaction conditions. This protocol does not involve any metal catalysts or additives. It is simple, inexpensive, and easy to prepare, and exhibits good reaction activity. The hydrochlorination proceeds smoothly to yield unique regioselective products via the Markovnikov addition rule.

关键词： Hydrochlorination Arylalkynes Vinyl chlorides Catalyst-free Markovnikov addition

One-Pot Synthesis of Triarylmethanes via Metal-Free Reductive Coupling of Diaryl Ketones, Tosylhydrazide, and Arylboronic Acids

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Chinese Journal of chemistry 2016年第10期34卷 1033-1038页

作者： Xu Shen Ningning Gu Ping Liu Xiaowei Ma Jianwei Xie Yan Liu Bin Dai school of chemistry and chemical engineering the Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan Shihezi University Shihezi Xinjiang 832003 China

Synthesis of triarylmethanes via metal-free reductive coupling of diaryl ketone, tosylhydrazide, and arylboronic acids has been developed. This methodology is realized via one-pot two-step reactions involving the preparation of N-tosylhydrazones by reacting tosylhydrazide with diaryl ketone derivatives, followed by the reductive coupling with arylboronic acid in the presence of potassium carbonate to afford various triarylmethanes analogues in moder- ate to good yields. Importantly, the system presented here enables the use of easily accessible starting materials and a series of substrates with diverse functional group could be tolerant in this reaction. This approach could also be particularly useful for the synthesis of triaryl-substituted carbazolyl compounds.

关键词： diaryl ketone arylboronic acid tosylhydrazide one-pot

Pd（0）-Catalyzed Tandem One-Pot Reaction of Biphenyl Ketones/Aldehydes to the Corresponding Di-substituted Aryl Olefins

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Chinese Journal of chemistry 2017年第7期35卷 1141-1148页

作者： Yang Liu Ping Liu Yan Liu Yu Wei school of chemistry and chemical engineering the Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan Shihezi University Shihezi Xinjiang 832003 China

Synthesis of di-substituted aryl olefins via a Pd（0）-catalyzed cross-coupling reaction of biphenyl ketones/alde- hydes, tosylhydrazide, and aryl bromides （or benzyl halides） was developed. This methodology was achieved by one-pot two-step reactions involving the preparation of N-tosylhydrazones by reacting tosylhydrazide with biphenyl ketones/aldehydes, followed by coupling with aryl bromides （or benzyl halides） in the presence of Pd（PPh3）4 and lithium t-butoxide to produce various di-substituted aryl olefins in moderate to good yields.

关键词： one-pot reaction biphenyl ketone N-tosylhydrazones di-substituted olefins palladium catalyzed