Scheme 71.
Regioselective synthesis of 1,2,3-triazoles 193a–e and 194a–e. Reagents and conditions: (a) CuSO4·5H2O, sodium ascorbate, DCM:H2O (1:1), 12 h; (b) AcONH4, Et3N, EtOH, 12 h; (c) Et3N, AcOH, 12 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.