Abstract
A new homocoupling reaction of 1,1-disubstituted propargyl carbonates or 1-monosubstituted propargyl carbonates, mediated by Ti(OiPr)2Cl2/Mg in ether at 0°C, was found to form symmetric 1,5-hexadiynes and 1-allenyl-5-ynes in moderate to high yields in various ratios.
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