反应详情

To a solution of methyl 6-(3-(6-hydroxyhexyloxy)phenyl)picolinate (13), (33 mg, 0.10 mmol, 1 eq.) in ethyl acetate (1 mL) was added triphosgene (14 mg, 0.047 mmol, 1.4 eq) dissolved in a minimum amount of ethyl acetate, followed immediately by DIEA (26 μL, 20 mg, 0.15 mmol, 1.5 eq). The mixture was stirred at room temperature for 30 min, the precipitated DIEA hydrochloride was filtered off, and the filtrate evaporated to dryness in vacuo. The oily residue of crude 14 was used directly for the next step.

1. filtrationthe precipitated DIEA hydrochloride was filtered off
2. customthe filtrate evaporated to dryness in vacuo