The reaction mechanisms of the alkaline hydrolysis of N-methylcarbamates were studied using the AM1 method by assuming two possible pathways: (1) nucleophilic attack of hydroxide ion on the car-bony1 carbon to give a tetrahedral complex followed by its breakdown to carbamic acid (BA,~); and (2) prot
Theoretical analysis on alkaline hydrolysis mechanisms of N-(2-methoxyphenyl) benzamide
✍ Scribed by Yifan Jin; Yanyan Zhu; Mingsheng Tang
- Publisher
- Elsevier
- Year
- 2011
- Tongue
- English
- Weight
- 713 KB
- Volume
- 963
- Category
- Article
- ISSN
- 2210-271X
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✦ Synopsis
Reaction mechanisms of alkaline hydrolysis of N-(2-methoxyphenyl) benzamide have been investigated using density functional theory (DFT). The whole reaction could be regarded as a successive process that consisted of two main stages: generation of the tetrahedral intermediate (M1) and the transformation from M1 to the final products. Three reaction channels were proposed for the second stage. Channel 1 is an intramolecular proton migration process. In channel 2 and channel 3, which could be regarded as an intermolecular proton migration process, the water molecule participates in the reaction and becomes a medium of proton transferring. We found that the rate-determining activation energy required for channel 2 and 3 is lower than channel 1, which indicates that the water not only acts as the solvent, but also plays an important role in the reaction. And this reaction could occur easily at room temperature, which is in good agreement with the experiments.
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