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. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: Bioorg Med Chem. 2011 Aug 27;19(21):6474–6482. doi: 10.1016/j.bmc.2011.08.053

Scheme 3.

Scheme 3

Solid Phase Synthesisa

aReagents: (a) piperidine. (b) Fmoc/tBu solid phase synthesis. (c) N3(CH2)5CO2H, Cl-HOBt, DIC. (d) trifluoroacetic acid/triisopropylsilane/thioanisole/water (91/3/3/3).