Pyridine → HCID 86687244, compound

Participants

Reaction Conditions

Reaction Steps

A solution of Intermediate 140b (129 mg, 0.41 mmol) in DCM (4.1 mL) was treated with pyridine (0.046 mL, 0.57 mmol) and the mixture was cooled 0° C. Phenyl chloroformate (0.066 mL, 0.53 mmol) was added and the resulting mixture was stirred at RT for 16 h. The mixture was cooled to 0° C. and treated with pyridine (0.013 mL, 0.16 mmol) then phenyl chloroformate (0.015 mL, 0.12 mmol) and stirred at RT for a further 1.75 h. Once again the mixture was cooled to 0° C. and treated with pyridine (0.013 mL, 0.16 mmol) then phenyl chloroformate (0.015 mL, 0.12 mmol) and stirred at RT for 1.75 h. The mixture was diluted with water and the phases were separated. The aqueous layer was extracted with DCM (×2) and the combined organic phase was washed with brine, dried (Na2SO4), and concentrated in vacuo to give a yellow gum (236 mg). Trituration with ether and filtration of the resulting solid gave the title compound as a white solid (75 mg, 39%). LCMS (Method 3): Rt 3.21 min, m/z 438.4 [MH+].

Provenance & Evidence