反应详情

To 177 mg (0.823 mmol) of N-tert-butoxycarbonyl-4-piperidinemethanol, as prepared in step f of Example 1, 195 mg (0.785 mmol) of 3-(2-chlorobenzyloxy)-5-methylphenol, as prepared in the preceding step, 262 mg (1.02 mmol) of triphenylphosphine, and 250 μL (2.27 mmol) of N-methylmorpholine in 3 mL of tetrahydrofuran was added 140 μL (0.892 mmol) of diethyl azodicarboxylate. The reaction mixture was stirred overnight, quenched with saturated NaCl (50 mL), and extracted into ethyl acetate (50 mL). The organic extract was dried (MgSO4), and the product was partially purified by flash chromatography (ethyl acetate/hexane (1:4)), to give 230 mg of impure title compound (contaminated with 3-(2-chlorobenzyloxy)-5-methylphenol). This material was used as is in the next reaction.

1. customquenched with saturated NaCl (50 mL)
2. extractionextracted into ethyl acetate (50 mL)
3. extractionThe organic extract
4. dry with materialwas dried (MgSO4)
5. customthe product was partially purified by flash chromatography (ethyl acetate/hexane (1:4))