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. 2017 Jun 12;22(6):977. doi: 10.3390/molecules22060977

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© 2017 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 29 — Dehydration of several pyrazolines in basic conditions; ^a Yield of isolated product. ^{b 19}F NMR yield with PhF as internal standard. ^c bis(CHF₂)-NH-pyrazole 73 formed after BOC (tert-butoxycarbonyle) cleavage.