Synthesis of Cyclic and Acyclic Nucleoside Phosphonates and Sulfonamides Derived from 6‐(Thiophen‐2‐yl)‐7‐fluoro‐7‐deazapurine.

Ribonuclosides derived from 6‐hetaryl‐7‐dezapurines are potent cytostatics, but their mechanism of action is unknown. Here we designed and synthesized a series of cyclic and acyclic nucleoside phosphonates, as well as carboxy, cyano, sulfo, and sulfonamide acyclic analogues derived from 6‐thiophen‐2‐yl‐7‐deazapurine and 7‐fluoro‐6‐thiophen‐2‐yl‐7‐deazapurine as ribonucleoside monophosphate mimics. None of these analogues exerted significant cytotoxic and antiviral activity. [ABSTRACT FROM AUTHOR]