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1. The synergistic effect during co-combustion of municipal sludge and coal: Experimental and ReaxFF molecular dynamic study

Author:
Tong Xu; Chunbo Wang; Dikun Hong; Song Li; Shuang Yue
Source:
Energy 2023 v.262 pp. 125553
ISSN:
0360-5442
Subject:
aromatic compounds,   etc   ; carbon dioxide; coal; combustion; energy; intermediate product; sludge; synergism; thermogravimetry;     Show all 9 Subjects
Abstract:
... In this work, the behaviors of municipal sludge/coal co-combustion were investigated by experiments and ReaxFF molecular dynamic simulations. The molecular models of coal and sludge were constructed based on experimental characterization. The characteristics of the separately combustion of sludge and coal from ReaxFF MD simulations were consistent with that from thermostatic thermogravimetric expe ...
DOI:
10.1016/j.energy.2022.125553

2. Precursors and formation pathways of furfural in sugarcane juice during thermal treatment

Author:
Huimei Huang; Jiebo Chen; Mingfeng Zheng; Lulu Zhang; Hongfei Ji; Huajin Cao; Fengxia Dai; Lu Wang
Source:
Food chemistry 2023 v.402 pp. 134318
ISSN:
0308-8146
Subject:
aromatic compounds,   etc   ; Maillard reaction; food chemistry; fructose; furfural; glucose; heat treatment; juice quality; serine; sugarcane juice;     Show all 10 Subjects
Abstract:
... As a potent aromatic compound, furfural may have adverse effects on sugarcane juice quality. In this study, simplified sugarcane juice models containing glucose, fructose and amino acids were used to explore the potential precursors and formation pathways of furfural. The changes of precursors and intermediates involved in furfural formation were quantified. The results indicated that fructose con ...
DOI:
10.1016/j.foodchem.2022.134318

3. Pioneering observation of atmospheric volatile organic compounds in Hangzhou in eastern China and implications for upcoming 2022 Asian Games

Author:
Bowei Li; Steven Sai Hang Ho; Xinhe Li; Liya Guo; Rui Feng; Xuekun Fang
Source:
Journal of environmental sciences (China) 2023 v.124 pp. 723-734
ISSN:
1001-0742
Subject:
aromatic compounds,   etc   ; aerosols; air pollution; air quality; alkenes; combustion; pollution control; solvents; urban areas; volatile organic compounds; China;     Show all 11 Subjects
Abstract:
... Understanding the emission sources of volatile organic compounds (VOCs) is critical for air pollution mitigation. Continuous measurements of atmospheric VOCs were conducted from January to February in Hangzhou in 2021. The average measured concentration of total VOCs (TVOCs) was 38.2 ± 20.9 ppb, > 42% lower than that reported by previous studies at the urban center in Hangzhou. The VOC concentrati ...
DOI:
10.1016/j.jes.2021.12.029

4. Observation-based sources evolution of non-methane hydrocarbons (NMHCs) in a megacity of China

Author:
Yarong Peng; Hongli Wang; Qian Wang; Shengao Jing; Jingyu An; Yaqin Gao; Cheng Huang; Rusha Yan; Haixia Dai; Tiantao Cheng; Qiang Zhang; Meng Li; Jianlin Hu; Zhihao Shi; Li Li; Shengrong Lou; Shikang Tao; Qinyao Hu; Jun Lu; Changhong Chen
Source:
Journal of environmental sciences (China) 2023 v.124 pp. 794-805
ISSN:
1001-0742
Subject:
aromatic compounds,   etc   ; acetylene; air; air pollution control; alkenes; cities; evaporation; inventories; models; natural gas; oil and gas industry; ozone; solvents; China;     Show all 14 Subjects
Abstract:
... Both concentrations and emissions of many air pollutants have been decreasing due to implement of control measures in China, in contrast to the fact that an increase in emissions of non-methane hydrocarbons (NMHCs) has been reported. This study employed seven years continuous NMHCs measurements and the related activities data of Shanghai, a megacity in China, to explore evolution of emissions and ...
DOI:
10.1016/j.jes.2022.01.040

5. Direct Amidation of Ferrocenyl/ Phenyl β- Chlorocinnamaldehyde Assisted by Chalcogenide Metal Carbonyl Cluster

Author:
Deepak Sharma; Vijesh Tomar; Charu Sharma; Meena Nemiwal; Raj K. Joshi
Source:
Tetrahedron letters 2022 pp. 154163
ISSN:
0040-4039
Subject:
aromatic compounds,   etc   ; amides; ferrocenes; selenides;     Show all 4 Subjects
Abstract:
... Herein, we report a direct amidation reaction of ferrocenyl/phenyl substituted β-chlorocinnamaldehyde in presence of a robust and chalcogen stabilized iron selenide carbonyl cluster Fe₃Se₂(CO)₉. The amidation of vinylic Cₛₚ²-Cl and amides was established and Cₛₚ²-N bond formation was obtained at strongly feasible reaction conditions. The wide substrate scope of the reaction has been investigated f ...
DOI:
10.1016/j.tetlet.2022.154163

6. Visible-light induced dearomatization reactions

Author:
Yuan-Zheng Cheng; Zuolijun Feng; Xiao Zhang; Shu-Li You
Source:
Chemical Society reviews 2022 v.51 no.6 pp. 2145-2170
ISSN:
1460-4744
Subject:
aromatic compounds,   etc   ; light; materials science; photocatalysis;     Show all 4 Subjects
Abstract:
... Dearomatization reactions provide rapid access to structurally complex three-dimensional molecules from simple aromatic compounds. Plenty of reports have demonstrated their utilities in the synthesis of natural products, medicinal chemistry, and materials science in the last decades. Recently, visible-light mediated photocatalysis has emerged as a powerful tool to promote many kinds of transformat ...
DOI:
10.1039/c9cs00311h

7. Total synthesis of linoxepin facilitated by a Ni-catalyzed tandem reductive cyclization

Author:
Jing-Si Cao; Jing Zeng; Jian Xiao; Xiao-Han Wang; Ya-Wen Wang; Yu Peng
Source:
Chemical communications 2022 v.58 no.52 pp. 7273-7276
ISSN:
1364-548X
Subject:
aromatic compounds,   etc   ; chemical communication; cyclization reactions;     Show all 3 Subjects
Abstract:
... A nickel-catalyzed reductive cyclization was developed to construct the tricyclic core embedded in linoxepin, a cyclolignan with a unique benzoxepin ring. The generated diastereodivergent acetals could be converted to the common unsaturated lactone, thus allowing a racemic synthesis of this molecule after incorporation of the remaining aromatic ring. This strategy with a late-stage installation of ...
DOI:
10.1039/d2cc02221d

8. Intramolecular activation of strong Si–O bonds by gold(i): regioselective synthesis of 3-bromo-2-silylbenzofurans

Author:
Paula Fernández-Canelas; Rubén Miguélez; Eduardo Rubio; José Manuel González; Pablo Barrio
Source:
Chemical communications 2022 v.58 no.66 pp. 9250-9253
ISSN:
1364-548X
Subject:
aromatic compounds,   etc   ; gold; organic chemistry; regioselectivity;     Show all 4 Subjects
Abstract:
... The high reactivity of gold-vinylidene complexes, generated in situ by [1,2]-bromine shift from the corresponding 1-bromoalkynes, allows the activation of one of the strongest bonds in organic chemistry (Si–O), strategically placed at the ortho-position. In this way, the synthesis of 3-bromo-2-silylbenzofuranes is achieved in good yields. Several substituents with different electronic properties a ...
DOI:
10.1039/d2cc03060h

9. The Scholl Reaction as a Powerful Tool for Synthesis of Curved Polycyclic Aromatics

Author:
Yiqun Zhang; Sai Ho Pun; Qian Miao
Source:
Chemical reviews 2022 v.122 no.18 pp. 14554-14593
ISSN:
1520-6890
Subject:
aromatic compounds,   etc   ; organic chemistry; reaction mechanisms; topology;     Show all 4 Subjects
Abstract:
... The past decade has witnessed remarkable success in the synthesis of curved polycyclic aromatics through Scholl reactions which enable oxidative aryl–aryl coupling even in company with the introduction of significant steric strain. These curved polycyclic aromatics are not only unique objects of structural organic chemistry in relation to the nature of aromaticity but also play an important role i ...
DOI:
10.1021/acs.chemrev.2c00186

10. Unraveling the Role of Aromatic Ring Size in Tuning the Electrochemical Performance of Small-Molecule Imide Cathodes for Lithium-Ion Batteries

Author:
Jingjing Chen; Shuai Gu; Rui Hao; Kun Liu; Zhiqiang Wang; Zhiqiang Li; Huimin Yuan; Hao Guo; Kaili Zhang; Zhouguang Lu
Source:
ACS applied materials & interfaces 2022 v.14 no.39 pp. 44330-44337
ISSN:
1944-8252
Subject:
aromatic compounds,   etc   ; electrochemistry; electrodes; imides; redox potential;     Show all 5 Subjects
Abstract:
... Organic electrode materials have the typical advantages of flexibility, low cost, abundant resources, and recyclability. However, it is challenging to simultaneously optimize the specific capacity, rate capability, and cycling stability. Radicals are inevitable intermediates that critically determine the redox activity and stability during the electrochemical reaction of organic electrodes. Herein ...
DOI:
10.1021/acsami.2c11138

11. Boron trifluoride etherate for regioselective rearrangement or opening of secondary aryl glycidic amides

Author:
David M. Aparicio; Dulce Tépox-Luna; Mercedes Bedolla-Medrano; Dino Gnecco; Jorge R. Juárez; Ángel Mendoza; María L. Orea; Joel L. Terán
Source:
Tetrahedron 2022 v.122 pp. 132934
ISSN:
0040-4020
Subject:
aromatic compounds,   etc   ; amides; boron; ethylene oxide; regioselectivity;     Show all 5 Subjects
Abstract:
... A regioselective 1,2-acyl, 1,2-hydrogen migration, and intermolecular opening of secondary aryl glycidic amides catalyzed by BF₃·OEt₂ were investigated. Derived from this reaction, α-Formyl acid, α-ketoamides, or fluorohydrin derivatives could regioselective be obtained, depending on the nature of the aromatic ring substituent bearing on the oxirane ring. To demonstrate the plausible mechanism in ...
DOI:
10.1016/j.tet.2022.132934

12. Deoxygenative CO₂ conversions with triphenylborane and phenylsilane in the presence of secondary amines or nitrogen-containing aromatics

Author:
Takumi Murata; Mahoko Hiyoshi; Shinsuke Maekawa; Yuta Saiki; Manussada Ratanasak; Jun-ya Hasegawa; Tadashi Ema
Source:
Green chemistry 2022 v.24 no.6 pp. 2385-2390
ISSN:
1463-9270
Subject:
aromatic compounds,   etc   ; carbon dioxide; green chemistry; solvents;     Show all 4 Subjects
Abstract:
... BPh₃ catalyzed the N-methylation of secondary amines and the C-methylenation (methylene-bridge formation between aromatic rings) of N,N-dimethylanilines or 1-methylindoles in the presence of CO₂ (1 atm) and PhSiH₃ without solvent at 30–40 °C. A cascade reaction from 1-methyl-2-oxindole to 3,3′-methylenebis(1-methylindole) via 1-methylindole also proceeded. ...
DOI:
10.1039/d1gc04599g

13. Four new glucosides from the aerial parts of Equisetum sylvaticum

Author:
Zhichao Wang; Yusen Tian; Sachiko Sugimoto; Yoshi Yamano; Susumu Kawakami; Hideaki Otsuka; Katsuyoshi Matsunami
Source:
Natural medicines 2022 v.76 no.4 pp. 832-841
ISSN:
1340-3443
Subject:
aromatic compounds,   etc   ; Equisetum sylvaticum; glucosides; skeleton; spectroscopy;     Show all 5 Subjects
Abstract:
... Two previously undescribed megastigmane glucosides, (3S)-3-hydroxy-4-oxo-7,8-dihydro-β-ionone-3-O-β-D-glucopyranoside (1), (3S)-3-hydroxy-4-oxo-β-ionone-3-O-β-D-glucopyranoside (2), an apocarotenoid glucoside named equiseoside A (3) and an unusual aromatic compound with a glucose-fused skeleton named equiseoside B (4), together with 35 known compounds (5–39) were isolated from the aerial parts of ...
DOI:
10.1007/s11418-022-01643-0

14. Construction of tetralin and chromane cores by the Lewis acid promoted ring-opening cyclization of cyclopropyl methanesulfonates

Author:
Ilya Novikau; Andrei Leushukou; Mikita Tsiuryn; Alaksiej Hurski
Source:
Tetrahedron letters 2022 v.104 pp. 154025
ISSN:
0040-4039
Subject:
aromatic compounds,   etc   ; Lewis acids; ambient temperature; chromates;     Show all 4 Subjects
Abstract:
... Rearrangement of cyclopropyl methanesulfonates to allylic carbocations was employed for the construction of tetralin and chromate bicyclic cores. We found that this transformation proceeds efficiently and rapidly at room temperature in the presence of dimethylaluminium triflate serving as a non-nucleophilic Lewis acid. The reaction begins with the cyclopropanol ring-opening and follows by the Frie ...
DOI:
10.1016/j.tetlet.2022.154025

15. Role of the Counteranion in the Stereospecific Living Cationic Polymerization of N-Vinylcarbazole and Vinyl Ethers: Mechanistic Investigation and Synthesis of Stereo-Designed Polymers

Author:
Hironobu Watanabe; Arihiro Kanazawa; Satoshi Okumoto; Sadahito Aoshima
Source:
Macromolecules 2022 v.55 no.11 pp. 4378-4388
ISSN:
1520-5835
Subject:
aromatic compounds,   etc   ; composite polymers; ligands; polymerization; stereospecificity;     Show all 5 Subjects
Abstract:
... The effects of counteranions in the cationic polymerization of N-vinylcarbazole (NVC) and vinyl ethers were investigated to develop guidelines for stereospecific living cationic polymerization. The counteranion structure, such as the charge number, metal center, and ligand, was systematically examined using the CF₃SO₃H/onium halide/metal halide initiating system. As a result, the electronic proper ...
DOI:
10.1021/acs.macromol.2c00090

16. C–H heteroarylation of aromatics via catalyst free SN2′ coupling cycloaromatization

Author:
Qixing Lu; Tao Wang; Qian Wu; Lijing Cheng; Han Luo; Lei Liu; Guobiao Chu; Lufeng Wang; Baosheng Li
Source:
Green chemistry 2022 v.24 no.11 pp. 4399-4404
ISSN:
1463-9270
Subject:
aromatic compounds,   etc   ; catalysts; chemical bonding; drugs; green chemistry;     Show all 5 Subjects
Abstract:
... The construction of a carbon–carbon bond is the most fundamental aspect of synthetic chemistry. In this study, we developed a catalyst-free SN2′ reaction of β-OTf-substituted enamides with aromatics to obtain aryl-substituted aza-1,4-dicarbonyl compounds that can be in situ transformed into aryl-imidazole, aryl-thiazole, and aryl-oxazole in one-pot operation, thus achieving C–H heteroarylation of ...
DOI:
10.1039/d2gc00467d

17. In Situ Coal Tar Reforming with Char and Its Reaction Model Considering Pore Consumption

Author:
Sou Hosokai; Yoshizo Suzuki; Koichi Matsuoka; Koji Kuramoto
Source:
Energy & fuels 2022 v.36 no.12 pp. 6119-6129
ISSN:
1520-5029
Subject:
aromatic compounds,   etc   ; coal; coal tar; energy; macropores; models;     Show all 6 Subjects
Abstract:
... The characteristics of in situ coal tar reforming with char were investigated. Subbituminous coal was continuously fed and pyrolyzed at 1173 K in a drop-tube reactor in the presence of additional char. The ratio of the additional char to coal was varied to clarify the effect of the amount of the additional char on tar reforming. The effect of the operation pressure was also evaluated. The experime ...
DOI:
10.1021/acs.energyfuels.2c00584

18. Nonplanar Rhombus and Kagome 2D Covalent Organic Frameworks from Distorted Aromatics for Electrical Conduction

Author:
Guolong Xing; Wenhao Zheng; Lei Gao; Ting Zhang; Xiaowei Wu; Shuai Fu; Xiaoyu Song; Ziqiang Zhao; Silvio Osella; Marta Martínez-Abadía; Hai I. Wang; Jinming Cai; Aurelio Mateo-Alonso; Long Chen
Source:
Journal of the American Chemical Society 2022 v.144 no.11 pp. 5042-5050
ISSN:
1520-5126
Subject:
aromatic compounds,   etc   ; crystal structure; electrical conductivity; electronics; spectroscopy;     Show all 5 Subjects
Abstract:
... Two-dimensional (2D) covalent organic frameworks (COFs) are an emerging class of promising 2D materials with high crystallinity and tunable structures. However, the low electrical conductivity impedes their applications in electronics and optoelectronics. Integrating large π-conjugated building blocks into 2D lattices to enhance efficient π-stacking and chemical doping is an effective way to impro ...
DOI:
10.1021/jacs.1c13534

19. Overview: Effective Separation of Oxygen-, Nitrogen-, and Sulfur-Containing Aromatics in High-Temperature Coal Tar by Ionic Liquids and Deep Eutectic Solvents: Experimental and Computational

Author:
Wei-Wei Yan; Xian-Yong Wei; Meng-Xiao Wang; Zhi-Min Zong
Source:
Industrial & engineering chemistry process design and development 2022 v.61 no.13 pp. 4481-4492
ISSN:
1520-5045
Subject:
aromatic compounds,   etc   ; coal tar; hydrogen; oils; process design;     Show all 5 Subjects
Abstract:
... Heteroatom-containing aromatics (HACAs), such as oxygen-containing aromatics (OCAs), nitrogen-containing aromatics (NCAs), and sulfur-containing aromatics (SCAs), in high-temperature coal tar (HTCT) can be regarded as valuable chemicals. Ionic liquids (ILs)/deep eutectic solvents (DESs) play a crucial role for selectively extracting and purifying HACAs from HTCT, which can be attributed to the com ...
DOI:
10.1021/acs.iecr.1c04724

20. Straightforward Synthesis of Highly Functionalized Indanes and Tetralines through Ene-Cyclopropene Rearrangement Mediated by Ruthenium

Author:
Alejandro Puet; Gema Domínguez; Javier Pérez-Castells
Source:
Journal of organic chemistry 2022 v.87 no.5 pp. 2686-2696
ISSN:
1520-6904
Subject:
aromatic compounds,   etc   ; aromatization; gold; organic chemistry; regioselectivity; ruthenium;     Show all 6 Subjects
Abstract:
... Ene-cyclopropenes give functionalized indanes and tetralines in the presence of ruthenium dimeric catalysts. This reaction involves the cyclopropene opening by the metal catalysts with a different regioselectivity respective to gold chlorides and produces totally different products than when using semisandwich ruthenium complexes. Here, the process leads to a bridged 7-oxanorbornene-type intermedi ...
DOI:
10.1021/acs.joc.1c02636