Diisopropylethylamine → HCID 86683260, compound

Participants

Reaction Steps

To a solution of (3R)-2-(tert-butoxycarbonylamino)-3-ethyl-5-methylnon-8-enoic acid (2.0 g, 6.4 mmole) in dichloromethane (20 mL) was added DIPEA (1.93 mL, 19.2 mmole) and HATU (2.42 g, 6.38 mmole) followed by (2S,4R)-methyl 4-hydroxypyrrolidine-2-carboxylate (1.15 g, 6.38 mmole) at room temperature. The reaction mixture was stirred at room temperature for 2 h. The reaction mass was diluted with DCM and washed with water. The organic layer was dried over anhydrous Na2SO4; filtered; then concentrated under reduced pressure to get crude compound as mixture of diastereomers. The material was subjected to SFC purification to afford (2S,4R)-methyl 1-((2S,3R)-2-(tert-butoxycarbonylamino)-3-ethyl-5-methylnon-8-enoyl)-4-hydroxypyrrolidine-2-carboxylate (1.5 g, 53%). MS: MS m/z 441.6 (M++1).

Provenance & Evidence