ChemInform Abstract: Fused Pyrimidines by a Tandem Aza‐Wittig/Electrocyclic Ring Closure Strategy: Synthesis of Pyrazolo(3,4‐d)pyrimidine, (1,2,3)Triazolo‐(4,5‐d)pyrimidine, and Thiazolo(4,5‐d)pyrimidine Derivatives. | Publicación