1: phenylacetylene With Schwartz's reagent in tetrahydrofuran T=20°C; 1 h; 2: (4S)-2,2-dimethyl-4-formyl-3-oxazolidine-carboxylic acid tert-butyl ester With zinc dibromide in tetrahydrofuran T=0 - 20°C; 24 h; 3: With sodium tetrahydroborate in tetrahydrofuran; methanol Title compound not separated from byproducts;
