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

. 2018 Jun 26;33(1):1095–1107. doi: 10.1080/14756366.2018.1477137

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

© 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

PMC Copyright notice

Scheme 3. — Synthesis of target compounds 11a–d and 13a, b; Reagents and conditions: (i) EtOH/AcOH(catalytic)/reflux 6h (ii) Dioxane/TEA (catalytic)/reflux 8h.