Scheme 1.
Synthesis of 2,5-diaminobenzoxazole derivatives. (a) MeOH, rt, 24 h, (b) KO2, acetonitrile, N2, rt, 16 h, (c) SnCl2, ultrasonication, rt, 3 h, (d) Acid chlorides or formaldehyde/sodium triacetoxyborohydride.
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.