Diisopropylethylamine → HCID 117607799、化合物

関与物質

反応手順

Sequentially HATU (1.21 g, 3.20 mmol) and DIEA (1.35 mL, 7.8 mmol) were added to a 0° C. solution of (S)-2-(tert-butoxycarbonylamino)-3-cyanopropanoic acid and (S)-2-amino-N-((S)-3-(cyclopent-1-en-1-yl)-1-((R)-2-methyloxiran-2-yl)-1-oxopropan-2-yl)-3-(4-methoxyphenyl)propanamide (TFA salt, 2.1 mmol) in DMF (20 mL). The reaction mixture was allowed to warm to ambient temperature and stirred for 3 h. EtOAc (100 mL) and water (100 mL) was added. The aqueous layer was extracted with EtOAc (50 mL×3). The combined organic phases were washed with brine (200 mL×3), dried over anhydrous sodium sulfate, and concentrated. The residue was purified by flash column chromatography on silica gel (EtOAc/hexane=1:2) to afford tert-butyl ((S)-3-cyano-1-(((S)-1-(((S)-3-(cyclopent-1-en-1-yl)-1-((R)-2-methyl oxiran-2-yl)-1-oxopropan-2-yl)amino)-3-(4-methoxyphenyl)-1-oxopropan-2-yl)amino)-1-oxopropan-2-yl)carbamate (590 mg, 45% yield).

情報源と証拠