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Synthesis of Diazirine-Based Nucleoside Analoguea
a Reagents and conditions: (a) Pd(OAc)2, nBu4N+Cl−, Cy2NCH3, DMF, 60 °C (46%); (b) nBu4N+F−, THF/HOAc, rt (92%); (c) Na(OAc)3BH, CH3CN/HOAc, −10 °C (56%); (d) DMTrCl, DMAP, pyridine, 0 °C (71%); (e) NC(CH2)2OP(Cl)N(iPr)2, DIPEA, CH2Cl2, 0 °C (84%).
