1: phenylacetylene With methyl α-D-glucopyranoside-based reagent; zinc trifluoromethanesulfonate; triethylamine in toluene T=23°C; 0.25 h; 2: heptanal in toluene T=40°C; 21 h; Title compound not separated from byproducts;

O2W(1-)*Li(1+) in tetrahydrofuran T=40°C; 24 h; variation of ratio RCHO/LiWO2, variation of reaction temperature; Product distributionMechanism;

T=200 - 210°C;

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zinc