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

. 2019 Mar 19;24(6):1080. doi: 10.3390/molecules24061080

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

© 2019 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 — Synthetic route for 3,5-diaminopyrazole derivatives 4–7. Reagents and Conditions: (a) N₂H₄·H₂O/EtOH-pyridine/reflux 2 h; (b) EtOH-pyridine/reflux 15 h; (c) 2b/PhNHNH₂/EtOH-pyridine/reflux 3 h; (d) AcOH/reflux 10 h.