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2
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0033597872
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This statement is rather intuitive because there is no way to have the imine and the corresponding iminium salts exactly in the same reaction environment. However, experiments in silico indicated that the iminium ions have a lower barrier than the corresponding imines. See for example Tomoda S, Senju T, Kawamura M, Ikeda T, J. Org. Chem. 1999 64 5396
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67649662479
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When our work was finished Metlushka et al. described an addition of trialkyl phosphites into Betti bases in the presence of TFA. We would like to thank a referee for this reference
-
When our work was finished Metlushka et al. described an addition of trialkyl phosphites into Betti bases in the presence of TFA. We would like to thank a referee for this reference:, Metlushka K E., Kashemirov B A., Zheltukhin V F., Sadkova D N., Büchner B, Hess C, Kataeva O N., McKenna C E., Alfonsov V A., Chem. Eur. J. 2009 15 6718
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8
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77954642104
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note
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Searching common databases gives a few hundred publications concerning aminophosphonates, more than three hundred 1-(alkylamino)alkylphosphonates, and about 150 papers describing their synthesis and properties. Since citation of all of them in this short article is inappropriate, we cite here only these papers that are strongly connected to our work. First, general methods of synthesis of these compounds based on the addition of dialkyl phosphonates to alkanimines was described by Pudovik and co-workers and independently by Fields in 1952
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