Scheme 5.
Reagents and conditions: (a) NBS, CH3CN, reflux; (b) dioxane, reflux or NaHCO3, dioxane, reflux; (c) EtOH, reflux
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.