Fig. 2. 18O isotope-labelling experiments.
Reaction conditions: 1a (3.0 mg, 3.6 μmol), CuBr2 (4.0 equiv.), o-DCB (3.0 mL) at 100 °C for 1.5 h in a sealed tube. a Absence of H218O. b 20.0 equiv. H218O.
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.