Dicyclohexylcarbodiimide → HCID 23387547, compound

Participants

Reaction Steps

To a cooled solution of 4-methoxybenzyl 4-hydroxycyclohexanoate (7.5 g, 28 mmole), 4-dimethylaminopyridine (0.73 g, 6 mmole) and N-benzyloxycarbonyl-L-valine (7.54 g, 30 mmole) in dichloromethane (90 ml) was added dicylohexyl-carbodiimide (6.8 g, 33 mmole) and the mixture was stirred for 2 days at room temperature. The mixture was cooled and the urethane was filtered. The solution was evaporated and 250 ml ethyl acetate was added. The organic phase was washed twice with 5% acetic acid, 5% sodium hydrogencarbonate and water. The organic phase was dried with sodium sulfate and evaporated under reduced pressure. The product was isolated by silica gel column chromatography with toluene/acetone. Yield: 13 g=93%

Provenance & Evidence