Benzoic acid (I) was condensed with hydrazine sulfate in the presence of NaOAc to afford phthalazinone (II). Further treatment of (II) with phosphoryl chloride at 80 C gave the 1-chlorophthalazine (III). Then, substitution of the halogen atom for N-benzyl-3-(exo)-aminotropane (IV) at 100 C provided the title compound.
Benzoic acid (I) was condensed with hydrazine sulfate in the presence of NaOAc to afford phthalazinone (II). Further treatment of (II) with phosphoryl chloride at 80 C gave the 1-chlorophthalazine (III). Then, substitution of the halogen atom for N-benzyltropan-3-(exo)-ol (IV) in refluxing THF provided the title compound.