A convenient method for the synthesis of 6-enaminopurine derivatives by catalytic hydrogenation of 6-cyanomethylenepurines
作者:Norimitsu Hamamichi、Tadashi Miyasaka
DOI:10.1016/s0040-4039(00)94939-6
日期:1985.1
6-Cyanomethylenepurines have been catalytically hydrogenated to the corresponding α-(aminomethylene)purine-6-acetic acid derivatives in good yields using dimethylformamide-benzene as solvent over Pd-C under medium pressure.
Synthesis of 6-C-substituted 9-tetrahydrofuranylpurine derivatives.
作者:Norimitsu HAMAMICHI、Tadashi MIYASAKA
DOI:10.1248/cpb.38.2018
日期:——
6-Dicyanomethylene-9-tetrahydrofuranylpurine (4), which was obtained by the reaction of 9H-1, 6-dihydropurine-Δ6, α-propanedinitrile (3) with 2, 3-dihydrofuran, has been catalytically hydrogenated to the α-(aminomethylene)-9-(tetrahydrofuran-2-yl)-9H-purine-6-acetonitrile (5) in good yield using N, N-dimethylformamide-benzene as a solvent over Pd-C under medium pressure. Substitution of 5 with amines gave the corresponding alkylaminomethylene purines (6 and 7). Reaction of 5 with hydrazine gave the pyrazole derivative (8).