Diisopropylethylamine → HCID 68503233, compound

Participants

Reaction Steps

To a solution of 2-(2-(tert-butyldiphenylsilyloxy)ethyl)-5-(2,5-difluorophenyl)-2-phenyl-1,3,4-thiadiazole-3(2H)-carbothioamide (0.500 g, 0.809 mmol) in 20 mL of ethanol was added tert-butyl 3-bromo-4-oxopiperidine-1-carboxylate (0.338 g, 1.21 mmol) followed by DIEA (0.423 mL, 2.43 mmol). The mixture was allowed to stir overnight at reflux then treated with tert-butyl 3-bromo-4-oxopiperidine-1-carboxylate (200 mg) and stirred at reflux for a further 3 hours. The cooled mixture was partitioned between saturated NaHCO3 solution (50 mL) and EtOAc (50 mL) and the aqueous layer was extracted with EtOAc (2×50 mL). The combined organic phases were washed with brine (50 mL) dried over Na2SO4 and concentrated in vacuo. The residue was purified by flash column chromatography (5-10% ethyl acetate/hexanes) to afford the desired product as a viscous yellow oil, 0.412 g, 64%.

Provenance & Evidence