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. Author manuscript; available in PMC: 2019 Feb 19.
Published in final edited form as: Tetrahedron. 2015 Mar 20;71(21):3507–3514. doi: 10.1016/j.tet.2015.03.052

Figure 1.

Figure 1.

19F-NMR of MTPA-derivatized (A) D- and Lalanine starting materials, and (B) alanyl-γPNA backbones prepared from the reductive amination (11a-i and 11b) and Mitsunobu (11a-ii) routes.