Diisopropylethylamine → tert-butyl ((2S,3R)-1-((2S,4R)-2-(((1R,2S)-1-((cyclopropylsulfonyl)carbamoyl)-2-vinylcyclopropyl)carbamoyl)-4-hydroxypyrrolidin-1-yl)-3,5-dimethyl-1-oxonon-8-en-2-yl)carbamate

Beteiligte Stoffe

Reaktionsschritte

To a solution of (2S,4R)-1-((2S,3R)-2-((tert-butoxycarbonyl)amino)-3,5-dimethylnon-8-enoyl)-4-hydroxypyrrolidine-2-carboxylic acid (10.4 g, 25.3 mmol), (1R,2S)-1-amino-N-(cyclopropylsulfonyl)-2-vinylcyclopropanecarboxamide p-toluenesulfonate salt (11.2 g, 27.8 mmol), and N,N-diisopropylethylamine (17.6 ml, 101 mmol) in CH2Cl2 (200 ml) was added HATU (11.5 g, 30.4 mmol). The mixture was stirred at room temperature for 16 h. The mixture was transferred to a separatory funnel and was thrice washed with aq. 1N HCl; then brine. The organic phase was dried over MgSO4; filtered; then concentrated in vacuo. The resulting residue was subjected to silica gel chromatography to afford tert-butyl ((2S,3R)-1-((2S,4R)-2-(((1R,2S)-1-((cyclopropylsulfonyl)carbamoyl)-2-vinylcyclopropyl)carbamoyl)-4-hydroxypyrrolidin-1-yl)-3,5-dimethyl-1-oxonon-8-en-2-yl)carbamate as a light-orange solid foam (14.8 g, 94%).

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