Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

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

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 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/).

PMC Copyright notice

Scheme 2 — Separation of racemic β²-Homo-amino acids. Reagents and conditions (i) coupling reagent TBTU, diisopropylethylamine (DIPEA), DMF, (ii) column chromatography: hexane (or CHCl₃)/AcOEt, (iii) 6M HCl reflux, (iv) ion exchange chromatography (Dowex 50W-X12), NH₃ aq.