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. 2021 Jan 27;74(6):381–396. doi: 10.1038/s41429-021-00408-3

Scheme 1.

Scheme 1

Synthesis of 6-deoxyspectinomycin 5 and 6-deoxyspectinamide 6. Reagents and conditions: [i] (a) 1,1′-Thiocarbonyldiimidazole, DMAP, DCM, (b) Bu3Sn-H/AIBN, Toluene, 55% over two steps; [ii] (a) 1 M HCl in MeOH, (b) IBX, DMSO, 85% over two steps; [iii] Pd/C-H2, MeOH, 81%; [iv] (a) NH4NO3/CH3COOH, 2-picoline-borane complex, MeOH, (b) 2-Pyridylacetic acid hydrochloride, HBTU, DMF, 25% over two steps; [v] Pd/C-H2, MeOH, 95%