反应详情

2-(2-Chloro-pyridin-4-yl)-3-{2-chloro-4-[3-(1-trityl-(1H)-tetrazol-5-yl)-propoxy]-phenyl}-1,1,1-trifluoro-butan-2-ol (80 mg, from previous step) was dissolved in CH2Cl2 (2.5 mL). To the solution was added trifluoroacetic acid (1.25 mL) at RT and the mixture was allowed to stir for 48 hours; almost complete conversion was observed. The reaction mixture was concentrated in vacuo and diluted with ethyl acetate and water. The layers were separated and the organic extracts were washed with brine, dried over Na2SO4 and evaporated. The residue was purified by flash chromatography (silica gel, gradient of ethyl acetate in heptane) to give the desired compounds as a white solid (46 mg). MS (m/e)=476.1 (MH+).

1. concentrationThe reaction mixture was concentrated in vacuo
2. additiondiluted with ethyl acetate and water
3. customThe layers were separated
4. washthe organic extracts were washed with brine
5. dry with materialdried over Na2SO4
6. customevaporated
7. customThe residue was purified by flash chromatography (silica gel, gradient of ethyl acetate in heptane)