1: DDQ / toluene / Heating 2: 1.) Hg(OTFA)2, 2.) KI, 3.) I2 3: Pd2(dba)3, P(o-tolyl)3, K2CO3 / toluene / Heating 4: Zn, AcOH 5: DCC 6: 93 percent / Zn, AcOH / ethyl acetate 7: 82 percent / Et3N, DMAP 8: 91 percent / Bu3P / benzene / 60 °C 9: 3-n-butyl-1,2-benzisothiazole-1,1-dioxide oxide / 48 h 10: NaBH4, AcOH 11: 87 percent / H2 / Pd/C / methanol / 0.25 h / 760 Torr View Scheme