摘要:
New nucleoside building blocks for the synthesis of functional DNA are presented. A porphyrin-bis nucleoside dU-porphyrin-dU was synthesised from a di-acetylene-substituted porphyrin using Sonogashira coupling with 5-iodo deoxy uridine. The same strategy was used to obtain a new terpy-functionalised nucleoside dU(terpy). This building block can be metallated with ruthenium(II) either to make a mono-nucleoside ruthenium complex (dU(terpy)) Ru-II(terpy), or to connect two building blocks to create a bis-nucleoside (dU(terpy))(2)Ru-II. The terpy nucleoside building block dU(terpy) was incorporated into short strands of DNA to give TXT, TXXT and TXXXT as sequences (X = dU(terpy)). The functionalised DNA has the potential to create supramolecular assemblies through metal complexation.