ChemInform Abstract: Tandem Aza‐Wittig Reaction/Electrocyclic Ring‐Closure ‐ a Facile Entry to the Synthesis of Fused Pyrimidines: Preparation of Pyrazolo(3,4‐d)‐ and 1,2,3‐Triazolo(4,5‐d)pyrimidine Derivatives. | Publicación