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.
Synthesis of quinolone ureas. Reagents and conditions were as follows: i, AcCl, TEA, DCM, 0 to 25°C, 3 h, 99%; ii, POCl3, DMF, 0 to 80°C, 16 h, 80%; iii, NaOAc·3H2O, AcOH, 110°C, 3 h, 80%; iv, NaCNBH3, AcOH, 2-propanol, 40°C, 1 h, 50% to 60%; v, DMAP (4-dimethylaminopyridine), DCM, 2 h, 40% to 50%.
