Scheme 2.
Reagents and conditions: (a) Montmorillonite in MeCN at RT for 3 d; (b) TFA in DCM at 0 °C → RT for 1 h; (c) EDCI, HOPO and DIPEA in DMF at RT for 24 h.
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.