• Alternatively, the protecting group can be removed from the intermediate by base to give monoarylacetylenes: J. Org. Chem., 48, 5135 (1983); 57, 6998 (1992). For an improved procedure, see: Synthesis, 589 (1996).
•
Adduct of acetylene and acetone which acts as an acetylene equivalent in the Pd-catalyzed (Sonogashira) coupling reaction with aryl or heteroaryl halides, permitting a one-pot diarylation by different halides: Synthesis, 571 (1984):
