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 Jan 13;26(2):394. doi: 10.3390/molecules26020394

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 (http://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Scheme 3 — Reagents and conditions: (a) NaBH₄, EtOH, 0 °C to r.t., 74% (7), 30% (8), and 50% (9). (b) TBAF.3H₂O, THF, r.t., 85% (from 7 to 10a), 68% (from 7 to 11a), 88% (from 8), and 86% (from 9). (c) TFA, MeOH, r.t., 87% (10a), 91% (11a), 92% (10b), and 93% (11b). (d) DIBAL-H, DCM, 0 °C to r.t., 70%.