机译:Iminophosphorane-mediated synthesis of fused 1,2,4triazines: preparation of 1,2,4triazolo5,1-c1,2,4triazine and 1,2,4triazino4,3-b1,2,4,5tetrazine derivatives
机译:Heterocycles by cycloaddition. Part 8. Preparation of 1benzopyrano4,3-bpyrroles by intramolecular cycloadditionndash;extrusion of mesoionic oxazolium-5-olates