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- W2950657816 abstract "In attempts to convert carboxylic acids directly into N-acylbenzotriazoles by using Ph3P/I2 as an acid-activating system, the outcome of the reaction is reversed from no reaction to almost quantitative yield of the expected product simply by switching the order of the addition of the reagents to the presumed acyloxyphosphonium intermediate. If triethylamine was present before treatment with 1H-benzotriazole, anhydride was always exclusively generated without a detectable amount of the expected product. However, if the base was applied after the addition of 1H-benzotriazole, the reaction proceeded smoothly to afford N-acylbenzotriazoles in good to excellent yields within short reaction times. 31P NMR spectroscopy revealed the presence of a benzotriazophosphonium species in preventing the formation of the anhydride by attack of the carboxylate anion at the acyl function of the acyloxyphosphonium salt." @default.
- W2950657816 created "2019-06-27" @default.
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- W2950657816 date "2015-04-01" @default.
- W2950657816 modified "2023-09-27" @default.
- W2950657816 title "ChemInform Abstract: Acyloxyphosphonium versus Aminophosphonium Intermediates: Application to the Synthesis of N-Acylbenzotriazoles." @default.
- W2950657816 cites W1903436503 @default.
- W2950657816 doi "https://doi.org/10.1002/chin.201516193" @default.
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