Synthèse et propriétés de nouveaux triazaphospholes: les 5-méthylthio 1,2,4,3-triazaphospholes

Autor:	Jean-Pierre Fayet, Youssef Kandri Rodi, L. Lopez, M. T. Boisdon, C. Malavaud
Rok vydání:	1993
Předmět:	chemistry.chemical_compound Trimethylsilyl Chemistry Stereochemistry Organic Chemistry MNDO General Chemistry Nuclear magnetic resonance spectroscopy Lewis acids and bases Catalysis Derivative (chemistry)
Zdroj:	Canadian Journal of Chemistry. 71:1200-1208
ISSN:	1480-3291 0008-4042
DOI:	10.1139/v93-155
Popis:	The synthesis of new 1,2,4,3-triazaphospholes is described: a number of 5-methylthio 1,2,4,3-triazaphospholes, substituted in the 1, 2, or 4 position. The 1,5-disubstituted compound 6 is stable, whereas 2,5-disubstituted compounds 14 and 16 undergo an equilibrium with their tetrameric form, the cyclotetraphosphazanes [14]4 and [16]4. 5-Methylthio 4-alkyl 1,2,4,3-triazaphospholes exist only in the tetrameric forms [12]4 and [13]4. [12]4 can be depolymerized by complexation with a Lewis acid, giving the complexed triazaphosphole 12•BF3. The 15N NMR spectrum of compound 16, the N-silylated derivative of 15, allows us to confirm the position of the trimethylsilyl group. MNDO calculations are in good agreement with experimental results, such as the reaction of 1,4-diazadienes with triazaphospholes providing new tetracoordinated phosphorus spirocompounds 21–25.
Databáze:	OpenAIRE
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