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

. 2021 Jul 27;26(15):4521. doi: 10.3390/molecules26154521

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

© 2021 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 (https://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Scheme 5 — Thalicarpine (43) and 6a,7-dehydrothalicarpine (87) syntheses via the late-stage installation of the ether bond using a classical Ullman coupling reaction followed by DDQ (2,3-dichloro-5,6-dicyano-l,4-benzoquinone) oxidation.