- Synthesis and Anti-Oomycete Activity of 1-Sulfonyloxy/Acyloxydihydroeugenol Derivatives
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Endeavor to discover biorational natural products-based fungicides, two series (26) of novel 1-sulfonyloxy/acyloxydihydroeugenol derivatives (3a–p and 5a–j) were prepared and assessed for their fungicidal activity against P. capsici Leonian, in vitro. Res
- Chen, Genqiang,Zhu, Lina,He, Jiaxuan,Zhang, Song,Li, Yuanhao,Guo, Xiaolong,Sun, Di,Tian, Yuee,Liu, Shengming,Huang, Xiaobo,Che, Zhiping
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- Nucleophilic Substitution at a Trigonal Carbon. Part 5. Substituent Effects in the Reactions of Aromatic Acyl Bromides with Methanol in Acetonitrile
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The kinetics of the methanolysis of benzoyl bromide and eight para- or meta-substituted derivatives in acetonitrile at 25.0 deg C can be analysed in terms of the simultaneous operation of overall second- and third-order processes.In turn, each of these processes can be analysed in terms of the simultaneous operation of two reaction channels, which are proposed to involve a carbonyl addition-elimination mechanism (favoured for electron-withdrawing substituents) and a process (SN2-SN1) proceeding through a loose SN2-type transition state.For the p-methoxybenzoyl bromide substrate, a third reaction channel is observed, but only for the overall second-order process (first-order in methanol), and this is tentatively described as involving electrophilic assistance by a methanol molecule to an ionization (SN1) pathway.
- Kevill, Dennis N.,Knauss, Donald C.
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p. 307 - 312
(2007/10/02)
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