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Synthesis 1992; 1992(3): 297-302
DOI: 10.1055/s-1992-26096
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Iminophosphorane-Mediated Annulation of 1,3,5-Triazine to Benzimidazole: Synthesis of 1,3,5-Triazino[1,2-a]benzimidazoles

Pedro Molina* , Angeles Lorenzo, Enrique Aller
  • *Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Murcia, Campus de Espinardo, E-30071 Murcia, Spain
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Publication Date:
17 September 2002 (online)

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A number of 1,3,5-triazino[1,2-a]benzimidazoles 5 and 7 have been prepared by aza-Wittig-type reaction of 2-(triphenylphosphoranylideneamino)benzimidazoles 2 and 6, which were derived from 2-aminobenzimidazoles, with isocyanates under neutral conditions.

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