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. (a) pyridine, hydroxylamine-O-sulfonic acid, KOH, NaHCO3, H2O, DCM, 70 °C → rt, 12 h, 51%; (b) NH2R3, K3PO4, XPhos, Pd2(dba)3, toluene, 110 °C, 12 h, 22%; (c) NH2R3, n-BuOH, 110 °C, 12 h, 40–88%.
