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)447n-BuLi (4, 5, or 10 equiv), TMEDA, hexane, 60 °C, 3 h; (b) Se powder (10 equiv), THF, −78 °C to rt, 8 h; (c) Cu nanopowder, 215 °C, 160 min; (d) Te powder (10 equiv), ultrasound, rt, 12 h; (e) oxone, THF/H2O (4/1), rt, 12 h; (f) 30% aq. H2O2, DCM/AcOH (5/1), 24 h; (g) Br2, DCM, rt, 15 min.
