The Role of Iodine Catalyst in the Synthesis of 22-Carbon Tricarboxylic Acid and Its Ester: A Case Study | |
Liu, YX (Liu, Yanxia)[ 1,2,3 ]; Zhang, YG (Zhang, Yagang)[ 1,2,3,4 ]; Wang, LL (Wang, Lulu)[ 1,2,3 ]; Zan, XJ (Zan, Xingjie)[ 1 ]; Zhang, LT (Zhang, Letao)[ 1 ] | |
刊名 | CATALYSTS |
2019 | |
卷号 | 9期号:12页码:1-14 |
关键词 | Diels-Alder reaction 22-carbon tricarboxylic acid iodine H-1-NMR ESI-MS |
ISSN号 | 2073-4344 |
DOI | 10.3390/catal9120972 |
英文摘要 | Here, 22-carbon tricarboxylic acid (C22TA) and its ester (C22TAE) were prepared via the Diels-Alder reaction of polyunsaturated fatty acids (PUFAs) and their esters (PUFAEs) as dienes with fumaric acid (FA) and dimethyl fumarate (DF) as dienophiles, respectively. The role of an iodine catalyst for the synthesis of C22TA and C22TAE in the Diels-Alder type reaction was investigated using a spectroscopic approach. The chemical structures of the products were characterized using proton nuclear magnetic resonance (H-1-NMR) and electrospray ionization mass spectrometry (ESI-MS) analysis. Results showed that nonconjugated dienes can react with dienophiles through a Diels-Alder reaction with an iodine catalyst, and that iodine transformed the nonconjugated double bonds of dienes into conjugated double bonds via a radical process. DF was more favorable for the Diels-Alder reaction than FA. This was mainly because the dienophile DF contained an electron-withdrawing substituent, which reduced the highest and lowest occupied molecular orbital (HOMO-LUMO) energy gap and accelerated the Diels-Alder reaction. By transforming nonconjugated double bonds into conjugated double bonds, iodine as a Lewis acid increased the electron-withdrawing effect of the carbonyl group on the carbon-carbon double bond and reduced the energy difference between the HOMO of diene and the LUMO of dienophile, thus facilitating the Diels-Alder reaction. |
WOS记录号 | WOS:000507336600001 |
内容类型 | 期刊论文 |
源URL | [http://ir.xjipc.cas.cn/handle/365002/7837] |
专题 | 新疆理化技术研究所_资源化学研究室 |
作者单位 | 1.Univ Elect Sci & Technol China, Sch Mat & Energy, Chengdu 611731, Peoples R China 2.Xinjiang Inst Engn, Dept Chem & Environm Engn, Urumqi 830026, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, YX ,Zhang, YG ,Wang, LL ,et al. The Role of Iodine Catalyst in the Synthesis of 22-Carbon Tricarboxylic Acid and Its Ester: A Case Study[J]. CATALYSTS,2019,9(12):1-14. |
APA | Liu, YX ,Zhang, YG ,Wang, LL ,Zan, XJ ,&Zhang, LT .(2019).The Role of Iodine Catalyst in the Synthesis of 22-Carbon Tricarboxylic Acid and Its Ester: A Case Study.CATALYSTS,9(12),1-14. |
MLA | Liu, YX ,et al."The Role of Iodine Catalyst in the Synthesis of 22-Carbon Tricarboxylic Acid and Its Ester: A Case Study".CATALYSTS 9.12(2019):1-14. |
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