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Synthesis 1990; 1990(6): 474-475
DOI: 10.1055/s-1990-26908
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Iminophosphorane-Mediated Synthesis of Pyrido[2,3-d]pyrimidine Derivatives

Pedro Molina* , Maria Jesús Vilaplana
  • *Departamento de Química Orgánica, Facultad de Ciencias Quimicas y Matemáticas, Universidad de Murcia, Campus de Espinardo, E-30071, Murcia, Spain
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Publication Date:
17 September 2002 (online)

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The 5-(2-nitroethenyl)-6-[(triphenylphosphoranylidene)amino]-pyrimidine derivative 3, prepared from 1,3-dimethyl-2,4-dioxo-6-[(triphenylphosphoranylidene)amino] -1,2,3,4-tetrahydropyrimidine (1) and 1-dimethylamino-2-nitroethylene (2), reacts with aryl isocyanates 4 to give 7-arylamino-1, 3-dimethyl-2,4-dioxo-6-nitro-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidines 6 in good yield.

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