Pyridine → HCID 23387551, compound

Participants

Reaction Steps

To a mixture of 4-methoxybenzyl 5-(N-CBz-L-valyloxy)-4-hydroxy-2,2-dimethylvalerate (20.6 g, 40 mmol), Pyridine (31.6 g, 400 mmol) in CH2Cl2 (500 mL) at 0° C., was added dropwise a solution of stearoyl chloride (18.2 g, 60 mmol) in CH2Cl2 (100 mL). After 1 h at 0° C., the temperature of the reaction mixture was allowed to assume room temperature and then the mixture was stirred for 5 h at room temperature. The mixture was extracted with a 10% aqueous solution of NaHCO2 (300 mL) and the aqueous phase was washed with CH2Cl2 (200 mL). The combined organic layers were dried (Na2SO4) and concentrated under reduced pressure. The crude product was column chromatographed (silica gel, 1→5% MeOH in CH2Cl2), to give 27.2 g of 4-metoxybenzyl 5-(N-CBz-L-valyloxy)-4-stearoyloxy-2,2-dimethylvalerate.

Provenance & Evidence