反应详情

5-(5-Azidopentanoyl)-2,2-dimethyl-1,3-dioxane-4,6-dione was heated with 3-hydroxypropionitrile (2.42 g, 34.0 mmol) at 80° C. until no more CO2 was released. After cooling to room temperature, the mixture was diluted with 150 ml of 2-propanol, and 4-nitrobenzaldehyde (4.60 g, 30.3 mmol), piperidine (130 mg, 1.50 mmol) and acetic acid (90 mg, 1.50 mmol) were added. The mixture was stirred at room temperature for 48 hrs. The product, 7-azido-2-[(4-nitrophenyl)methylene]-3-oxoheptanoic acid 2-cyanoethyl ester was obtained as a pale-yellow oil (5.73 g, 51% yield) after chromatography (SiO2, Hexane:AcOEt, 2:1).

1. additionwere added