反应详情

温度

150 °C

40 g (2-methyl-5-nitrophenyl)guanidine in 160 mL N-methyl pyrrolidone is dissolved. The mixture is heated to 150° C. and ethyl β-oxo-3-pyridine propionate is added portionwise, to 50 g total in a time period of 5 hours, distillating about 15 g of by-products under a nitrogen flow. At the end of the reaction, the mixture is cooled and diluted with ethanol. The precipitate is filtrated, yielding, upon drying, 46.4 g of product with HPLC purity of 99% (A %), identified through LC-MS and 1H-NMR.

1. customAt the end of the reaction
2. temperaturethe mixture is cooled
3. filtrationThe precipitate is filtrated
4. customyielding
5. customupon drying