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Total syntheses of chrysomycin A, polycarcin V, and gilvocarcin V through late-stage C-glycosylation. Reagents and conditions are as follows: (i) SnCl4, 4 Å MS, DCE, r.t. (ii) BCl3, CH2Cl2, −20 °C. (iii) 1.5 M H2SO4 in MeOH, 70 °C. (iv) AlCl3, CH2Cl2, −20 °C. (v) NaOMe, MeOH, r.t.
