1999 organo-phosphorus compounds, acyclic C derivatives

organo-phosphorus compounds, acyclic C derivativesS 0082

25 - 157Synthesis of 3-Phosphorylated 2-Aza-1,3-dienes from Imines Derivedfrom Bisphosphonates. — In the presence of cesium carbonate as base,the bisphosphonylalkyl imines (I) react with aldehydes (II) and (IV) to yield theazubutadienes and trienes (III) and (V), respectively. Thermolysis of the latterresults in heterocyclization to the substituted pyridine (VI). — (PALACIOS,FRANCISCO; GIL, MARIE J.; DE MARIGORTA, EDUARDO MARTINEZ;RODRIGUEZ, MARTA; Tetrahedron Lett. 40 (1999) 12, 2411-2414; Dep.Quim. Org., Fac. Farm., Univ. Pais Vasco, E-01080 Vitoria, Spain; EN)

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