Skip to main content
. Author manuscript; available in PMC: 2014 Sep 9.
Published in final edited form as: Tetrahedron. 2013 Sep 9;69(36):7771–7778. doi: 10.1016/j.tet.2013.05.012

Scheme 6.

Scheme 6

Enantioselective C–H oxidation approach to the core furan precursor (−)-22 of the goniothalesdiol family. aSAD = Sharpless Asymmetric Dihydroxylation. Conditions: K2OsO4-2H2O (1 mol%), (DHQD)2PHAL (5 mol%), K2CO3 (3 equiv.), NaHCO3 (3 equiv.) K3Fe(CN)6 (3 equiv.), MeSO2NH2 (1 equiv.), t-BuOH:H2O:CH2Cl2 10:10:1, 0°C-> rt