A flexible synthesis of C-6 and N-1 analogues of a 4-amino-1,3-dihydroimidazo[4,5-c]pyridin-2-one core

A Strong Hydride Donating, Acid Stable and Reusable 1,4-Dihydropyridine for Selective Aldimine and Aldehyde Reductions

A 1,4-dihydropyridine derivative, lacking carbonyl groups and containing bulky aryl substituents, was synthesized and found to have a high hydride donating ability, acid resistance and reusability. Thermodynamic parameters for electron...

Access to 3-Deazaguanosine Building Blocks for RNA Solid-Phase Synthesis Involving Hartwig-Buchwald C-N Cross-Coupling

3-Deazaguanosine (c³G) and phosphoramidite derivatives thereof that allow incorporation of this modification into RNA are needed for atomic mutagenesis experiments to explore mechanistic aspects of ribozyme catalysis. Here, we report a practical synthesis for c³G phosphoramidites from inexpensive starting materials. The key reaction sequence is a silyl-Hilbert-Johnson nucleosidation followed by Hartwig-Buchwald cross-coupling to achieve the N²-phenoxyacetyl protected c³G nucleoside.