Figure 4

General method for synthesis of scaffold 1. Reagents and conditions: (a) TEMPO, I2, sat. NaHCO3/CHCl3 (1:3) dark, 0 °C to rt, 1 h.

General method for synthesis of scaffold 1. Reagents and conditions: (a) TEMPO, I2, sat. NaHCO3/CHCl3 (1:3) dark, 0 °C to rt, 1 h.