反应详情

55.8 mg (0.086 mmoles) of (1,1-dimethylethyl) 3-[[5-ethyl-6-[4-(1,2,3,4-tetrahydro-1,8-naphthyridin-7-yl)-1-piperidinyl]-4-pyrimidinyl]amino]-N-(4-methoxy-benzenesulphonyl)alaninate in 5 ml of dichloromethane with 0.5 ml of trifluoroacetic acid is stirred at ambient temperature until the starting product disappears according to TLC (silicagel, eluent: CH2Cl2-MeOH—H2O—AcOH 85-15-2-2). Toluene is added and the reaction mixture is evaporated to dryness under reduced pressure (2 kPa). The residue is solubilized in the minimum amount of dichloromethane with a little methanol then poured into diisopropyl ether. The precipitate is filtered. 59.8 mg (Yield=85% expressed as ditrifluoroacetate) of expected product is obtained.

1. customthe reaction mixture is evaporated to dryness under reduced pressure (2 kPa)
2. additionthen poured into diisopropyl ether
3. filtrationThe precipitate is filtered