Hydrochloric Acid → HCID 86650013, compound

Participants

Reaction Steps

To a solution of {[2-(acetylamino)-1,3-thiazol-4-yl]methyl}(triphenyl)phosphoniumbromide (7.970 g, 16.03 mmol) in anhydrous N,N-dimethylformamide (32 ml) was added potassium tert-butoxide (3.687 g, 32.86 mmol) at 0° C., and the mixture was stirred for 1 hr. A solution of 4-(1,3-dioxolan-2-yl)-5-(trimethylsilyl)thiophene-2-carbaldehyde (2.740 g, 10.69 mmol) in anhydrous N,N-dimethylformamide (6 ml) was added dropwise, and the mixture was stirred for 1 hr. 1M Hydrochloric acid (17.0 ml) and iced water (170 ml) were added, and the mixture was extracted 3 times with ethyl acetate. The combined organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (FUJI SILYSIA CHEMICAL LTD. BW-300SP 200 g, ethyl acetate:dichloromethane=1:6) to give N-(4-{2-[4-(1,3-dioxolan-2-yl)-5-(trimethylsilyl)thiophen-2-yl]vinyl}-1,3-thiazol-2-yl)acetamide (4.010 g, 10.16 mmol, yield 95.0%) as an off-white solid.

Provenance & Evidence