Te. Mabry et al., SYNTHESIS OF ETA-D-RIBOFURANOSYLAMINO)PYRIMIDO[5,4-D]PYRIMIDINE (DFARPP) - STABILITY AND CELLULAR CYTOTOXICITY, Nucleosides & nucleotides, 13(5), 1994, pp. 1125-1133
The synthesis of beta-dFARPP was accomplished by Mitsunobu coupling of
6-cyanopurine with 2-deoxy-2,2-difluororibose followed by purine ring
-expansion under the action of methanolic ammonia. The title compound
inhibited the growth of proliferating human leukemic CCRF-CEM cells at
6.1 mu g/ml but had no effect on plaque formation by a variety of DNA
and RNA viruses.