Phosphorus oxychloride → HCID 86726372, compound

Participants

Reaction Conditions

Reaction Steps

The product from step 1 (134 mg, 0.42 mmol) and the product from step 4 (200 mg, 0.42 mmol) were dissolved in pyridine (4 mL) and the stirred solution was cooled to −10° C. in an ice/acetone bath. To the cold solution was added POCl3 dropwise (0.04 mL, 0.46 mmol). The mixture was stirred at −10° C. for 30 min. The reaction was quenched by the addition of saturated aqueous NaHCO3 solution (5 mL) and the mixture was allowed to warm to ambient temperature. The mixture was diluted with water (20 mL) and extracted with dichloromethane (3×15 mL). The combined dichloromethane phases were dried (Na2SO4), filtered, and the filtrate solvents were removed in vacuo. The residue was purified on a 12 g silica gel column using a gradient elution of 0-100% EtOAc:hexanes. Fractions containing product were combined and the solvents were removed in vacuo to give the title compound as a gum. (M+H-Boc)+=683.

Provenance & Evidence