“…The syntheses and properties of the other acetylenic substrates, 4-(4-methylphenyl)but-3-yn-2-one (Ic), 4-phenylbut-3-yn-2-one (IIb), 4-(2,4-dimethylphenyl)but-3-yn-2-one (Id), 4-(4-methoxyphenyl)but-3-yn-2-one (If) [40], 4-(2,4,6-trimethylphenyl)-but-3-yn-2-one (Ie) [22]; 1,3-diphenylprop-2-yn-1-one (Ih) [41]; 2,4-diphenylbut-3-yn-2-ol (IIa), 1,1,3-triphenylprop-2-yn-1-ol (IIf), 2-methyl-4-(4-methylphenyl)but-3-yn-2-ol (IIg) [17], 3-(4-fluorophenyl)-propynoic acid (IIIb), 3-(4-methylphenyl)propynoic acid (IIIc) [42], methyl 3-phenylpropynoate (IVa), and methyl-3-(4-methylphenyl)propynoate (IVb) [43] were reported previously.…”