反应详情

Under a nitrogen atmosphere 1.28 g (6.36 mmol) 4-nitrophenyl chloroformate were added at RT to a solution of 0.78 g (6.36 mmol) 4-dimethylaminopyridine in 100 mL pyridine and the mixture was stirred for 1 h at RT. Then a solution of 2.00 g (6.36 mmol) methyl(R)-3-(4-benzyloxy-3,5-dimethyl-phenyl)-2-hydroxy-propionate in 20 mL pyridine was added dropwise at RT and the reaction mixture was stirred for 2 h after the end of the addition. Then 1.71 g (6.36 mmol) 3-piperidin-4-yl-1,3-dihydro-imidazo[4,5-c]quinoline-2-one was added to the reaction mixture, which was then heated to 100° C. for 4 h. The precipitate formed was filtered off, the filtrate was evaporated down i.vac., the residue was mixed with 200 mL EtOAc and 200 mL semisaturated KHSO4 solution, the product being obtained as a precipitate. This was suction filtered and dried.

1. stirringthe reaction mixture was stirred for 2 h
2. additionafter the end of the addition
3. temperaturewas then heated to 100° C. for 4 h
4. customThe precipitate formed
5. filtrationwas filtered off
6. customthe filtrate was evaporated down i.vac
7. addition, the residue was mixed with 200 mL EtOAc and 200 mL semisaturated KHSO4 solution
8. customthe product being obtained as a precipitate
9. filtrationThis was suction filtered
10. customdried