Volume 19, Issue 2 pp. 125-132
Research Article
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1,3,6-Azadiphosphacycloheptanes: A novel type of heterocyclic diphosphines

Andrey A. Karasik

Corresponding Author

Andrey A. Karasik

A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, Kazan Scientific Center Arbuzov str. 8, Kazan 420088, Russian Federation

A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, Kazan Scientific Center Arbuzov str. 8, Kazan 420088, Russian FederationSearch for more papers by this author
Anna S. Balueva

Anna S. Balueva

A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, Kazan Scientific Center Arbuzov str. 8, Kazan 420088, Russian Federation

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Elvira I. Moussina

Elvira I. Moussina

A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, Kazan Scientific Center Arbuzov str. 8, Kazan 420088, Russian Federation

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Roman N. Naumov

Roman N. Naumov

A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, Kazan Scientific Center Arbuzov str. 8, Kazan 420088, Russian Federation

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Alexey B. Dobrynin

Alexey B. Dobrynin

A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, Kazan Scientific Center Arbuzov str. 8, Kazan 420088, Russian Federation

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Dmitry B. Krivolapov

Dmitry B. Krivolapov

A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, Kazan Scientific Center Arbuzov str. 8, Kazan 420088, Russian Federation

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Igor A. Litvinov

Igor A. Litvinov

A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, Kazan Scientific Center Arbuzov str. 8, Kazan 420088, Russian Federation

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Oleg G. Sinyashin

Oleg G. Sinyashin

A. E. Arbuzov Institute of Organic and Physical Chemistry, Russian Academy of Sciences, Kazan Scientific Center Arbuzov str. 8, Kazan 420088, Russian Federation

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First published: 04 March 2008
Citations: 36

Abstract

The novel type of seven-membered cyclic diphosphines, namely 1,3,6-azadiphosphacycloheptanes, has been synthesized by condensation of 1,2-bis(phenylphosphino)ethane, formaldehyde, and primary amines (aniline, p-toluidine, benzylamine, and 5-aminoisophthalic acid) as a mixture of rac- and meso-stereoisomers. The structures of rac-stereoisomers of N-tolyl and N-(3′,5′-dicarboxyphenyl)-substituted diphosphines were investigated by X-ray crystal structure analyses. The stereoisomers of N-(3′,5′-dicarboxyphenyl)-substituted compound were separated at a preparative scale, and their platinum(II) dichloride complexes were obtained. The corresponding meso-isomer readily forms P,P-chelate complex with [PtCl2(cod)], whereas the rac-stereoisomer forms oligomeric complex. © 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:125–132, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20397

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