Br[C:2]1[S:6][CH:5]=[N:4][C:3]=1[C:7]([O:9][CH2:10][CH3:11])=[O:8].C(N(CC)CC)C.[C:19]([Si:21]([CH3:24])([CH3:23])[CH3:22])#[CH:20].O>CN(C=O)C.[Cu]I.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.CCCCCC.C(OCC)(=O)C>[CH2:10]([O:9][C:7]([C:3]1[N:4]=[CH:5][S:6][C:2]=1[C:20]#[C:19][Si:21]([CH3:24])([CH3:23])[CH3:22])=[O:8])[CH3:11]5-Bromo-4-ethoxycarbonylthiazole (18.64 g) was dissolved in 80 ml of DMF. Triethylamine (22 ml), 16.7 ml of ethynyltrimethylsilane, 960 mg of copper(I) iodide, and 1.11 g of bis(triphenylphosphine)palladium(II) dichloride were added in that order to the solution, and the mixture was stirred at 90° C. under an argon atmosphere for one hr. Water (80 ml), 160 ml of ethyl acetate and 160 ml of hexane were added to the reaction solution, and the mixture was washed with (brine+aqueous hydrochloric acid), sodium bicarbonate water, and brine in that order. Activated carbon and anhydrous magnesium sulfate were added to the organic layer, and the mixture was filtered and was concentrated under the reduced pressure to give 16.45 g of the title compound.
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