Bridged cyclophosphazenes resulting from deprotonation reactions of cyclotriphophazenes bearing a P–NH group

• DOI: 10.1039/c1dt10073d
• Publication Date: 2011-04-07T13:00:32Z
• Authors: Serap Beşli; Simon J. Coles; David B. Davies; Adem Kılıç; Robert A. Shaw
• Keywords: Sodium hydride; Tetrahydrofuran

Cyclotriphosphazene derivatives containing a P-NHR group in the side-chain react presence of strong base to form stable intermolecular bridged products. Reaction sodium hydride with mono-spiro cyclophosphazene having P-NH group, N(3)P(3)Cl(4)[O(CH(2))(3)NH], (1a) or N(3)P(3)Cl(4)[CH(3)N(CH(2))(3)NH], (1b) leads formation bis-cyclophosphazenes an eight-membered ring ansa arrangement (2a, 2b) whereas reaction mono-amino [N(3)P(3)Cl(5)(NHR), R = n-hexyl, 3a; i-Pr, 3b; Ph, 3c] give four-membered cyclophosphazane spiro (4a-c). In latter P-O-P compounds (5a-c) were also obtained as result hydrolysis reactions associated amount moisture solvent tetrahydrofuran. addition, it was found that mixture cyclotriphosphazene either mono compound, (1b), lead first examples asymmetrically-bridged cyclophosphazenes (6a-b).