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. 2020 May 25;25(10):2461. doi: 10.3390/molecules25102461

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Scheme 1 — Synthesis of racemic β²-Homo-amino acids. Reagents and conditions (i) MeI, K₂CO_3(dry), -N,N dimethylformamide (DMF), (ii) Ar’CHO, piperidine, MeOH, (iii) CoCl₂·6H₂O, NaBH₄, Boc₂O, MeOH_(dry).