Methanol → (S)-tert-butyl 3-amino-4-(((S)-1,1-diethoxypropan-2-yl)(quinolin-8-ylmethyl)amino)-4-oxobutanoate

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Reaction Steps

(S)-tert-Butyl 3-(((9H-fluoren-9-yl)methoxy)carbonylamino)-4-(((S)-1,1-diethoxypropan-2-yl)(quinolin-8-ylmethyl)amino)-4-oxobutanoate (Compound III-17) 18.4 g (27 mmol) and piperidine 22.7 g (270 mmol) were added in DCM (90 ml). The mixture was stirred for 1.5 h at room temperature. The mixture was diluted with DCM (200 ml) and washed with water (150 ml×3). The solution was concentrated in vacuo. The residue was purified by column chromatography on silica gel with PE:EA=50:1 to DCM:MeOH=10:1 to give the title compound 10.5 g, (yield 85%).

Provenance & Evidence