反应详情

A round bottomed flask was charged with (1R,2S)-1-(((9H-fluoren-9-yl)methoxy)carbonylamino)-2-methylcyclopropanecarboxylic acid (408 mg, 1.209 mmol) and a stir bar. DCM (25 mL, 0.05 M) was added, followed by one drop of DMF and oxalyl chloride (97 μl, 1.109 mmol). Stirred at room temperature 1 h. A solution of triethylamine (562 μl, 4.03 mmol) and (2-amino-4,5-dimethylthiophen-3-yl)(4-chlorophenyl)methanone (268 mg, 1.008 mmol) in DCM (10 mL, 0.1 M) was added dropwise, and the solution stirred at room temperature overnight before being concentrated with celite and purified by flash chromatography to give (9H-fluoren-9-yl)methyl (1R,2S)-1-(3-(4-chlorobenzoyl)-4,5-dimethylthiophen-2-ylcarbamoyl)-2-methylcyclopropylcarbamate as a yellow amorphous solid (225 mg) LRMS (M+H)+: 586 m/z.

1. stirringthe solution stirred at room temperature overnight
2. concentrationbefore being concentrated with celite
3. custompurified by flash chromatography