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. Author manuscript; available in PMC: 2016 Nov 15.
Published in final edited form as: Bioorg Med Chem Lett. 2015 Oct 14;25(22):5067–5071. doi: 10.1016/j.bmcl.2015.10.022

Scheme 1.

Scheme 1

Total synthesis of C5-Curc-2-HDA conjugate (6). i) CO2 (xs.), n-BuLi, THF, −78°C, 24h; ii) 1M HCl, iii) Vanillin, DIC, dry THF-CH2Cl2 (1:1 v/v), DMAP, rt; iv) Acetone, LiOH-H2O, 24 h, rt.