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(A–C) Structural modification of products. (i) KHF2 (4.5 equiv), MeOH/H2O 2:1, rt, 3 h. (ii) NIS (1.5 equiv), THF, rt, 2 h. (iii) ArB(OH)2 (1.5 equiv), Pd(PPh3)4 (5 mol %), K2CO3 (3 equiv), 1,4-dioxane/H2O 6:1, 100 °C, 2 h. (iv) Cu(OAc)2 (1 equiv), Et3N (2 equiv), 4 Å MS, MeCN, 80 °C, 20 h. (v) ICyCuCl (10 mol %), NaOtBu (1.2 equiv), B2(pin)2 (1.5 equiv), THF, rt, 16 h. a Ellipsoids shown at 30% probability.
