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. Author manuscript; available in PMC: 2008 Dec 8.
Published in final edited form as: J Nat Prod. 2007 Jul 4;70(7):1073–1083. doi: 10.1021/np0680735

Scheme 7.

Scheme 7

a

aReagents and conditions: (a) Formamide, 150 °C, 0.5 h, 100%.27 (b) MeI, NaHCO3, DMF, 23 °C, 18 h, 83%.28 (c) BzlBr, K2CO3, DMF, 60 °C, 18 h, 95%.29 (d) LiOH, aq THF/CH3OH, 23 °C, 18 h, 79%.