Hydrochloric Acid → HCID 136333956, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of 3-amino-5-bromothiophene-2-carboxamide (300 mg) produced in Example 1, step D, triethylamine (0.208 mL) and tetrahydrofuran (7.0 mL) was added 3-chloropropanoyl chloride (0.143 mL) while stirring at 0° C. The reaction mixture was stirred at room temperature for 30 min, and 2-(methylamino)ethanol (0.542 mL) was added. The reaction mixture was stirred with heating at 70° C. for 18 hr. The reaction mixture was neutralized with 1M aqueous hydrochloric acid solution at 0° C., and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography (ethyl acetate/hexane and methanol/ethyl acetate) to give 6-bromo-2-{2-[(2-hydroxyethyl)(methyl)amino]ethyl}thieno[3,2-d]pyrimidin-4(3H)-one (405 mg) as a pale-yellow solid. In the same manner as in Example 2, step C, the title compound (22 mg) was obtained as a pale-brown solid from 6-bromo-2-{2-[(2-hydroxyethyl)(methyl)amino]ethyl}thieno[3,2-d]pyrimidin-4(3H)-one (50 mg) produced above and tert-butyl 3-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole-1-carboxylate (93 mg), sodium carbonate (48 mg), 1,2-dimethoxyethane (1.0 mL) and water (0.5 mL) and [1,1′-bis(diphenylphosphino)ferrocene]palladium(II) dichloride-complex (1:1) (12 mg).

Provenance & Evidence