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: (i) 1-(2-hydroxyethyl)piperazine, HOBt, EDC·HCl, CH2Cl2, rt, 12 h. (ii) NaHCO3, triphosgene, CH2Cl2 dry, from 0 °C to rt, 6 h. (iii) Linker 2, CH2Cl2 dry, rt, 72 h.
