Trifluoroacetic acid → N-[3-(2-{Benzyl-[(R)-2-(8-benzyloxy-2-oxo-1,2-dihydroquinolin-5-yl)-2-(tert-butyldimethylsilanyloxy)ethyl]amino}ethyl)phenyl]-4-methylaminobutyramide

To a stirred solution of {3-[3-(2-{benzyl-[(R)-2-(8-benzyloxy-2-oxo-1,2-dihydroquinolin-5-yl)-2-(tert-butyldimethylsilanyloxy)ethyl]amino}ethyl)-phenylcarbamoyl]propyl}methylcarbamic acid tert-butyl ester (276 mg, 0.331 mmol) in DCM (3 mL) at room temperature was added trifluoroacetic acid (2 mL, 20 mmol) and the resulting mixture was stirred at room temperature overnight. LC-MS (Method 2-90) showed product was present (Rt 2.69 min; m/z 7.33.4 [M+H]+). The reaction mixture was concentrated under reduced pressure and the residue was dissolved in DCM. This solution was washed with aqueous saturated sodium bicarbonate solution (2×), dried over sodium sulfate, filtered and concentrated under reduced pressure to give the title compound (249 mg, 100% yield) as a yellow-brown oil, which was used in the next reaction without further purification.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. dissolutionthe residue was dissolved in DCM
3. washThis solution was washed with aqueous saturated sodium bicarbonate solution (2×)
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure

ORDレコード

ord-d73ef7bc2c0240268178d1ec6668f45e

出典データセット

uspto-grants-2013_10

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08551978B2