反应详情

温度

80 °C

tert-Butyl 4-chloro-5,8-dihydropyrido[4′,3′:4,5]thieno[2,3-d]pyrimidine-7(6H)-carboxylate from Example 11A (1.00 g, 3.07 mmol) was dissolved in 2-propanol (10 mL). 3-Aminophenol (352 mg, 3.22 mmol) and a 4 M solution of gaseous hydrogen chloride in dioxane (38 μL, 0.15 mmol) were added, and the mixture was heated to 80° C. for 20 h. Subsequently, further 4 M hydrogen chloride in dioxane (1.54 mL, 6.14 mmol) was added, and the mixture was heated for additional 3 h. The precipitate was collected by suction filtration to yield 1.21 g of the title compound as hydrochloride salt. An analytical amount was dissolved in 1 M aqueous sodium hydroxide solution which was then concentrated in vacuo. The precipitate was collected by suction filtration and dried to yield the product as free base.

1. temperaturethe mixture was heated for additional 3 h
2. filtrationThe precipitate was collected by suction filtration