Synthesis of a cyclopentane amide DNA analogue and its base pairing properties

Abstract

cpa-DNA monomers containing the bases adenine and thymine have been synthesized starting from the known compound 1 in 12 steps. Partially and fully modified cpa-thymidine and cpa-adenosine containing oligodcoxynucleotides were synthesized by standard oligonucleotide chemistry. Fully modified homo-cpa-A sequences lead to duplex destabilization by -1.4degreesC/mod. relative to DNA. As its congener bca-DNA, cpa-DNA prefers left-handed duplex formation where possible.