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. 2014 Apr 2;57(9):3803–3817. doi: 10.1021/jm500146g

Scheme 2. Synthesis of 6a–l.

Scheme 2

Reagents and conditions: (a) pClPhSO2Cl, DMAP, 23 °C, 0.5 h, DMF; 2, 0.5 h; MsOH, then 3, 60–120 °C, 20 h; (b) Ph3PAuNTf2, 50 °C, toluene, 1–12 h; (c) AcOH, NaBH3CN, MeOH, 0 °C, 0.5 h. [Ph3PAuNTf2 = [bis(trifluoromethanesulfonyl)imidate](triphenylphosphine)gold(I).]