Triethylamine → HCID 70041852, compound

Participants

Reaction Steps

N-(benzyloxysuccinyl)-L-proline (152.5 g, 0.5 mol), L-prolinol (50.5 g, 0.5 mol) and triethylamine (200 ml) are dissolved in methylene chloride (2 l), and a solution of DMC (127 g, 0.75 mol) in methylene chloride (500 ml) is added dropwise thereto over a period of 40 minutes under water-cooling. The mixture is stirred for a further three hours at room temperature. The reaction liquid is washed successively with water (1 l), a saturated aqueous solution of sodium hydrogen carbonate (1 l), 1N hydrochloric acid (1 l) and water (1 l), and the organic layer is dried over anhydrous magnesium sulfate and filtered. The filtrate is concentrated to dryness under reduced pressure and the residue is purified by column chromatography on silica gel (chloroform:methanol) to give N-(benzyloxysuccinyl)-L-prolyl-prolinol (90 g, 46.4%).

Provenance & Evidence