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.
a) Triphenylphosphine, 6-chloro-2-iodopurine, diisopropyl azodicarboxylate, anhydrous THF, 70%; b) 2M NH3 in i-PrOH, 70 °C, 64%; c) Iodotrimethylsilane, anhydrous CH2Cl2, 49%; d) Dowex-50 resin, MeOH:H2O (1:1, v/v), 55°C, 40% (14), 49% (15).
