Element Effect Revisited. Variable and Inverse Element Effect in the SNAr Reaction of Picryl Halide and 2,4-Dimethoxyaniline

Enantioselective synthesis of a novel kind of optically active nucleoside analogues from natural malic acid is described. In the given nucleoside analogues the tetrahydrofuran ring is replaced by a pyrrolidinonyl ring bearing both a primary and a secondary hydroxy groups which could be useful for the preparation of novel oligonucleotides. Assay of the prepared nucleoside analogues showed non-activity against virus.