Triethylamine → HCID 24991756, compound

Participants

Reaction Steps

Triethylamine (6.5 μL, 0.047 mmol) and ethyl chloroformate (7 μL, 0.073 mmol) were added sequentially to a solution of (Z)-7-[(1R,2S,3R,5R)-5-chloro-2-(3,5-dichloro-phenoxymethyl)-3-hydroxy-cyclopentyl]-hept-5-enoic acid (see U.S. 60/644,069, 20 mg, 0.047 mmol) in CH2Cl2 (0.47 mL) at room temperature. After 2.5 h, triethylamine (6.5 μL, 0.047 mmol) and 4-(2-hydroxyethyl)-morpholine (58 μL, 0.47 mmol) were added. After stirring overnight at room temperature, the reaction mixture was partitioned between H2O (5 mL) and CH2Cl2 (5 mL). The phases were separated and the aqueous phase was extracted with CH2Cl2 (2×5 mL). The combined organic phase was washed with 1 N HCl (5 mL) then dried (MgSO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (5% MeOH/CH2Cl2) afforded 5.1 mg (20%) of the title compound (2).

Provenance & Evidence