Fmoc-L-Tyr(tBu)-OH → (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

Participants

Reaction Steps

According to the procedure described in the synthesis method of Compound III-5, (S)—N-((5-chlorothieno[3,2-b]pyridin-3-yl)methyl)-1,1-diethoxypropan-2-amine (Compound IX-11) (996 mg, 3.03 mmol) was coupled with (S)-2-(((9H-fluoren-9-yl)methoxy)carbonylamino)-3-(4-tert-butoxyphenyl)propanoic acid (1.53 g, 3.33 mmol) and the obtained residue was purified by Büch silica gel column chromatography (eluent: chloroform:methanol=98:2) to obtain the title compound (1.29% g, 55%).

Provenance & Evidence