ABSTRACT
A number of substituted (borano) nucleic acids, 3′-[diethylphosphite-(cyano, carboxy, or carbamoyl) borano] deoxynucleosides (3a–4c) and 5′-[diethylphosphite(cyano or carboxy) borano] deoxynucleosides (6a–7d) were prepared by a variety of synthetic procedures. The syntheses of the pyrophosphates (2a–2c), as precursors for 3a–4c, are also described.
ACKNOWLEDGMENTS
This work was supported by grants from the National Science Foundation (CHE-9988045), the Robert A. Welch Foundation (N-1322 to JAM), the donors of the Petroleum Research Fund, administered by the American Chemical Society, and Northern Illinois University through Presidential Research Professorship. Professor Hosmane also gratefully acknowledges the Forschungspreis der Alexander von Humboldt-Stiftung.