1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 58742306, compound

Participants

Reaction Steps

To a solution of (6S,7R,4bR,8aR)-4b-ethyl-6,7-dihydroxy-7-prop-1-ynyl-4b,5,6,7,8,8a,9,10-octahydro-phenanthrene-2-carboxylic acid (20 mg, 0.061 mmol) in tetrahydrofuran (2 mL) was added sequentially diisopropylethylamine (0.042 mL, 0.24 mmol), 1-[3-(dimethylamino)propyl]-3-ethyl carbodiimide (14 mg, 0.073 mmol), 1-hydroxybenzotriazole (9 mg, 0.064 mmol) and C-(2-methylpyridin-3-yl)-methylamine (0.025 mL, approximately 0.2 mmol). The mixture was stirred at room temperature for 1 day and was then quenched with saturated aqueous ammonium chloride solution. After extracting twice with ethyl acetate, the combined organic layers were washed with brine, dried (MgSO4) and concentrated under vacuum. The title compound (10 mg, 38%) was isolated by flash chromatography eluting with 50% acetone in methylene chloride. Mass spectrum: m/e 433 (M+1).

Provenance & Evidence