Benzyl chloroformate → HCID 67385303, compound

Participants

Reaction Steps

((3R,5R)-5-Methyl-piperidin-3-yl)-carbamic acid tert-butyl ester (2.9 g, 13.53 mmol) was dissolved in 70 mL of a 1:1 mixture of dioxane and H2O and NaHCO3 (4.55 g, 54.13 mmol) was added. To the resulting suspension benzyl chloroformate (2.2 ml, 14.2 mmol) was added slowly. After 2 hours the reaction mixture was extracted with EtOAc. The combined organic layers were washed with saturated aqueous NaHCO3, dried (Na2SO4), filtered, and evaporated. The remaining oil was purified by SiO2 chromatography (150 g SiO2, hexanes/EtOAc 0-20% EtOAc) to give 3.6 g of (3R,5R)-3-tert-butoxycarbonylamino-5-methyl-piperidine-1-carboxylic acid benzyl ester as a colorless oil (76% yield).

Provenance & Evidence