Volume 27, Issue 1 pp. 12-22
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Zwitterionic Phosphoranides as Intermediates in the Reaction of Phosphorus Tribromide with N,N-Dimethyl-N′-arylformamidines

Anatoliy P. Marchenko

Anatoliy P. Marchenko

Institute of Organic Chemistry, Kyiv, 02094 Ukraine

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Georgyi N. Koidan

Georgyi N. Koidan

Institute of Organic Chemistry, Kyiv, 02094 Ukraine

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Anastasia N. Hurieva

Anastasia N. Hurieva

Institute of Organic Chemistry, Kyiv, 02094 Ukraine

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Alexander B. Rozhenko

Alexander B. Rozhenko

Institute of Organic Chemistry, Kyiv, 02094 Ukraine

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Aleksandr N. Kostyuk

Corresponding Author

Aleksandr N. Kostyuk

Institute of Organic Chemistry, Kyiv, 02094 Ukraine

Correspondence to: Aleksandr N. Kostyuk; e-mail: [email protected].Search for more papers by this author
First published: 27 August 2015
Citations: 9

ABSTRACT

Cyclic zwitterionic phosphoranides 2a,b were found to be intermediate products in the reaction of N,N-dimethyl-N′-(aryl)formamidines with PBr3. The structure of phosphoranide 2a was determined by means of the X-ray and quantum chemistry investigations. Mechanism of its formation was proposed based on Density functional theory (DFT) calculations. Reactions of 2 with amines and selenium yielded either C-phosphorylated formamidines or benzazaphospholes. The first example of intramolecular heterocyclization of a pentavalent phosphorus derivative 15b into 3Н-1,3-benzazaphosphole has been demonstrated.

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