期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 87, 期 13, 页码 8469-8479出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.2c00593
关键词
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资金
- JSPS KAKENHI
- [JP21K06483]
In this study, a series of pentafluorobenzoyl-based benzanilide compounds were designed and synthesized. It was found that the conformational ratio of these compounds in solution correlated linearly with the substituent on the anilide ring. Acid addition was able to switch one of the conformations.
Amide-based molecular switches had its limitation on structural diversities. In this work, we designed and synthesized a series of pentafluorobenzoyl-based benzanilide compounds. The conformational ratio of these compounds in solution was correlated linearly with Hammett's sigma p value of the substituent on the anilide ring, reflecting the repulsive interaction between the carbonyl group and the electron-rich aryl group. The addition of acid into the solution of 6, bearing pentafluorobenzoyl group, switched the stable amide conformation. In addition, the sizeable rotational barrier of 6 induced by the pentafluorobenzoyl moiety enabled us to monitor the conformational transition by means of 1H NMR spectroscopy.
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