反应详情

5-[2-(2-Chloro-4-hydroxy-phenyl)-1-hydroxy-1-trifluoromethyl-propyl]-3-methyl-3H-benzooxazol-2-one (150 mg, obtained in Example 172) was added to a solution of methyl-6-chloro-nicotinate (64 mg, [CAS Reg. No. 73781-91-6]) in DMF (1.9 mL) followed by the addition of triethylamine (0.067 mL). Stirring was continued for 10 minutes at r.t. Then 1,4-diazabicyclo[2.2.2]octane (6 mg) was added. The mixture was stirred over night at r.t. and then 4 hours at 60° C. The reaction mixture was poured into water, extracted with ethyl acetate and the organic layer was washed with brine, dried over Na2SO4 and evaporated. The residue was purified by flash chromatography (silica gel, gradient of heptane in ethyl acetate) to give the desired compound as a colorless foam (33 mg, 16%). MS (m/e)=537.2 [M+H+].

1. stirringThe mixture was stirred over night at r.t.
2. custom4 hours
3. customat 60° C
4. extractionextracted with ethyl acetate
5. washthe organic layer was washed with brine
6. dry with materialdried over Na2SO4
7. customevaporated
8. customThe residue was purified by flash chromatography (silica gel, gradient of heptane in ethyl acetate)