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. 2010 Dec 30;19(3):1155–1161. doi: 10.1016/j.bmc.2010.12.052

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Copyright © 2010 Elsevier Ltd. All rights reserved.

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Scheme 3 — Synthesis of N-terminal-modified compounds (C). Reagents: (a) 20% pip/DMF; (b) Fmoc-Ala-OH/DIC/HOBt/DMF; (c) 8/DIC/HOBt/DMF; (d) TFA/H₂O/TIPS (95:4:1); (e) R⁴XCOCl or R⁴SO₂Cl/propylene oxide/DMF; (f) R⁴NCO/DMF.