.write the mechanism for 3,4,6 compounds

Conditions: (a) 2 (5 mol%), PhSiH3 (5 mol%), PhH, 23 C, 18 h, 73%; (b)K2[OsO2(OH)4] (10 mol%), (DHQD)2PHAL (20 mol%), K3[Fe(CN)6], K2CO3, MeSO2NH2, tBuOH, H2O (1:1), 23 C, 3 d, 83%; (c) 5, pyridine, CH2Cl2, 23 C, 1.5 h, 96%, (d) DMDO, CHCl3, 23 C, 16 h, then AcOH, 62 C, 17 h, 78%; (e) cinnamic acid, 2,4,6trichlorobenzoyl chloride, Et3N, 4DMAP, CH2Cl2, 23 C, 5 h; (f) TBAF, AcOH (40 mol%), THF, 23 C, 1.5 h, 85% over 2 steps

b) K[OsC2(OH)4], (DHQD) PHAL, 73%a)2,PhSiH3 4 c) 5, pyridine 96% e) cinnamic acid