Scheme 1.
Synthesis of hydrazide 6. (a) CH3COOH, NaNO2, 0°C; (b) HCHO, HCl, 0-5°C; NH3, 70°C; (c) NH2NH2.H2O, 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.