反应详情

Triphenylphosphine (0.210 g, 0.801 mmol), tetrahydrofuran (0.62 mL), 1-piperidineethanol (0.683 mL, 5.14 mmol) and diethylazodicarboxylate (0.806 mL, 5.12 mmol) were added to 3-{1-perhydro-2H-pyran-2-yl-5-[1-(triphenylmethyl)(1,2,4-triazol-3-yl)]-1H-indazol-3-yl}phenol (0.654 g, 1.08 mmol). The mixture was stirred at ambient temperature for 23 h and poured into aqueous 6 N hydrochloric acid (30 mL). After stirring at ambient temperature for 4 h, the mixture was extracted with ether (3×). The aqueous fraction was added to aqueous 6 N sodium hydroxide (30 mL) and the pH adjusted to 11. The solution was extracted with ethyl acetate (3×) and the organic fractions were combined and dried over anhydrous sodium sulfate, filtered and evaporated. Purification by preparative HPLC (5–70% acetonitrile/water) followed by washing with saturated sodium bicarbonate and extraction with ethyl acetate gave the title compound (0.248 g, 59% yield). 1H NMR (CD3OD) δ 8.72 (m, 1H), 8.35 (s, 1H), 8.09 (m, 1H), 7.64 (m, 2H), 7.56 (s, 1H), 7.50 (m, 1H), 7.04 (m, 1H), 4.26 (s, 2H), 2.87 (s, 2H), 2.62 (s, 4H), 1.65 (s, 4H), 1.50 (s, 2H). ES-MS (m/z) 389 [M+1]+

1. stirringAfter stirring at ambient temperature for 4 h
2. extractionthe mixture was extracted with ether (3×)
3. additionThe aqueous fraction was added to aqueous 6 N sodium hydroxide (30 mL)
4. extractionThe solution was extracted with ethyl acetate (3×)
5. dry with materialdried over anhydrous sodium sulfate
6. filtrationfiltered
7. customevaporated
8. customPurification by preparative HPLC (5–70% acetonitrile/water)
9. washby washing with saturated sodium bicarbonate and extraction with ethyl acetate