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. Author manuscript; available in PMC: 2010 Jun 15.
Published in final edited form as: Bioorg Med Chem Lett. 2009 May 3;19(12):3229–3232. doi: 10.1016/j.bmcl.2009.04.100

Scheme 1.

Scheme 1

Reagents and conditions: (i) TBTU, TEA, HN(Me)OMe, DCM; (ii) LiAlH4, THF; (iii) 10a or 10b, NaH, THF; (iv) a) TFA, DCM; b) BocAAOH, TBTU, HOBt, TEA, DMF; (v) TFA, DCM; (vi) BF3.OEt2, HOCH2C6H4CO2H; (vii) 13a–f, TBTU, TEA, DMF, rt.