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. Author manuscript; available in PMC: 2010 Jun 10.
Published in final edited form as: J Am Chem Soc. 2009 Jun 10;131(22):7560–7561. doi: 10.1021/ja9029736

Scheme 6.

Scheme 6

Completion of the synthesisa

Reagents and conditions: (a) PtO2, H2, EtOH, rt, 65% (b) NaHB(OAc)3, MeCN/AcOH, 56% (c) LiOH, THF/H2O, 82%; (d) Me2NH•HCl, DCC, DMAP, 60%.