a Reagents and conditions: (a) Br2, 18-crown-6, CH2Cl2, 0°C, 30 min, quantitative; (b) 30, Pd(PPh3)4, Ba(OH)2, DME, H2O, μW, 25 min, 71.9%; (c) 9-Iodo-9-BBN, CH2Cl2, 0 °C, 4 h, then acetic acid, reflux, 5 h, 68.8%; (d) CH3MgI, THF, rt→reflux, 2 h; (e) p-TSA.H2O, CHCl3, rt, 6 h, 72.5 % for 33 and 56% for 35 (2 steps); (f) BBr3, CH2Cl2, reflux, 24 h, 85%.