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. Author manuscript; available in PMC: 2010 Sep 15.
Published in final edited form as: Bioorg Med Chem. 2009 Jul 26;17(18):6699–6706. doi: 10.1016/j.bmc.2009.07.057

Scheme 2.

Scheme 2

Reagents: (a) SOCl2/Et3N/DCM/−78 °C – RT; (b) RuCl3/NaIO4/CCl4/CH3CN/H2O/0 °C – RT; (c) (i) BocNH-CH(CH2CH2SH)-CO2t-Bu/BuLi/DMF/0 °C – RT, (ii) THF/H2SO4/H2O/0 °C; (d) TFA/H2O/0 °C - RT.