ETUDE DE L'ACTION DE L'OXYDE DU TRICHLOROPHOSPHINE SUR LES AMIDINES N-BENZIMIDAZOL-2-YL: SYNTHESE DES [1,2-a] BENZIMIDAZOLO-1,3,5,2-TRIAZAPHOSPHORINE-2-OXYDES

Abstract

The reaction of trichlorophosphine oxide with [1,2-a]benzimidazol-2-yl amidine 1 derived from [1,2-a]benzimidazoyl imidate leads to benzimidazolo-1,3,5,2-triazaphosphorine-2-oxides 3 in good yields. If the condensation is performed at room temperature, N-phosphonic amidines 2 can be isolated as intermediates. The isolated compounds 2 and 3 are identified by spectroscopic methods: IR, ¹H, ¹³C and ³¹P NMR as well as elemental analyses.

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Keywords:

• Amidines; imidates; trichlorophosphine oxide; [1
• 2-a]benzimidazolo-1
• 3
• 5
• 2-tiazaphosphorine-2-oxides

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