反应详情

温度

77.5 °C

To a mixture of 20.20 g (0.24 mole) sodium bicarbonate (Sigma, Ultrapure, dried in good vacuum at room temperature for 3 days over phosphorus pentoxide) and 6.64 g (0.04 mole) 3-amino-3-(pyridine-3-yl)propionic acid (Tyger, dried in good vacuum at room temperature for 3 days over phosphorus pentoxide) under argon atmosphere first 200 ml of dry acetonitrile (Fisher) was added then at very strong stirring 4.7 ml (0.044 mole) trifluormethanesulfonyl chloride (Acros) was slowly added and thereafter the reaction mixture was further stirred in an oil bath of 75-80° C. for 19 hours. After cooling and stirring in ice bath for 1 hour the reaction mixture was filtered, washed three times with dry acetonitrile and the combined organic solutions were evaporated on a rotavapor at 35° C. The solid residue (23.8 g) was extracted in a Soxhlet-type extractor with boiling chloroform for 26 hours. The evaporation of the chloroform solution gave 2.48 g (42%) pure product as white crystalline material (mp: 115-116° C.).

1. additionwas added
2. additionwas slowly added
3. temperatureAfter cooling
4. stirringstirring in ice bath for 1 hour the reaction mixture
5. filtrationwas filtered
6. washwashed three times with dry acetonitrile
7. customthe combined organic solutions were evaporated on a rotavapor at 35° C
8. extractionThe solid residue (23.8 g) was extracted in a Soxhlet-type extractor with boiling chloroform for 26 hours
9. customThe evaporation of the chloroform solution