期刊论文详细信息
Bulletin of the Korean chemical society | |
Studies on the Nuclear Magnetic Resonance Spectra of (E)-1-Aryl-3-(2- and 3-thienyl)-2-propenones and Unique Observation of 4J and 5J Coupling in Their 1H-1H COSY | |
Chang Kiu Lee1  In Sook Han Lee1  Hyun Ju Jeon1  | |
关键词: 1H and 13C NMR; Thiophene; Furan; Enone; Conformation in solution; | |
DOI : | |
学科分类:化学(综合) | |
来源: Korean Chemical Society | |
【 摘 要 】
1H and 13C NMR spectra of series of (E)-1-aryl-(2- and 3-thienyl)-2-propenones, that are aldol condensation products between 2- and 3-thiophenecarbaldehydes and m- and p-substituted acetophenones, were examined to make complete assignments of the chemical shifts. Long range couplings, 4J and 5J, are observed in the 1H-1H COSY of both 2- and 3-thienyl compounds, which makes the elucidation of the conformation in solution possible. In contrast, the 2-furyl analogue shows the long range coupling phenomena, but the 3-furyl and phenyl analogues do not show similar phenomena.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912010242806ZK.pdf | 984KB | download |