Piperidine → (S)-2-amino-3-(4-tert-butoxyphenyl)-N-((5-chlorothieno[3,2-b]pyridin-3-yl)methyl)-N-((S)-1,1-diethoxypropan-2-yl)propanamide

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Reaction Steps

According to the procedure described in the synthesis method of Compound IV-1, (9H-fluoren-9-yl)methyl(S)-3-(4-tert-butoxyphenyl)-1-(((5-chlorothieno[3,2-b]pyridin-3-yl)methyl)((S)-1,1-diethoxypropan-2-yl)amino)-1-oxopropan-2-ylcarbamate (Compound III-11) (512 mg, 0.66 mmol) was treated with piperidine and the obtained residue was purified by silica gel column chromatography (eluent: n-hexane:ethyl acetate=9:1, chloroform:methanol=100:0 and 8:2) to obtain the title compound (429 mg, 119%).

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