Hydroxylamine HCl → HCID 136052327, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of 4′-[(6-ethyl-2,4-dioxo-3,4-dihydrothieno[2,3-d]pyrimidin-1(2H)-yl)methyl]biphenyl-2-carbonitrile (0.8 g), 1-iodo-2,2-dimethylpropane (0.33 mL) and N,N-dimethylformamide (20 mL) was added sodium hydride (0.12 g), and the mixture was stirred at 100° C. for 1 day. The reaction mixture was diluted with ethyl acetate, washed successively with 5% aqueous potassium hydrogensulfate solution and saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The residue obtained by silica gel column chromatography was dissolved in dimethyl sulfoxide (5 mL), and the mixture was added to a mixture of hydroxylammonium chloride (0.24 g), sodium hydrogencarbonate (0.35 g) and dimethyl sulfoxide (5 mL), which had been stirred at 40° C. for 30 min in advance. The reaction mixture was stirred at 90° C. for 16 hr, diluted with chloroform, washed successively with water and saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The residue was dissolved in methylene chloride (10 mL), N,N′-carbonyldiimidazole (0.055 g) and then 1,8-diazabicyclo[5.4.0]undec-7-ene (0.047 mL) were added, and the mixture was stirred at room temperature for 2 hr. The reaction mixture was diluted with chloroform, washed successively with saturated aqueous potassium hydrogensulfate solution and saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The obtained residue was purified by preparative HPLC to give the title compound as colorless crystals (0.057 g, 39%).

Provenance & Evidence