| http://www.w3.org/ns/prov#value | - ture between about 50??? C. to about 100??? C., preferably about 70??? C., for a time period between about 2 hours to about 48 hours, preferably about 12 hours; (b) alkynes, when R2 is alkynyl, in the presence of a catalytic quantity of copper (I) iodide and palladium (0), and a polar solvent, such as dimethylformamide, at room temperature, for a time period between about 1 hour to about 5 hours,
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