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.
Reagents and conditions: (a) Montmorillonite in MeCN at RT for 5 d; (b) step 1: lutidine, TBDMSOTf in DCM at 0 °C → RT for 4 h, step 2: TFA in DCM at 0 °C → RT for 1 h; (c) CDI in DCM at RT for 1 h, 12 in THF at 60 °C for 16 h; (d) HF.Pyr in THF at RT for 5 h.
