反应详情

A stock solution of periodic acid/chromium trioxide was prepared according to WO 99/52850 by dissolving periodic acid (11.4 g, 50.0 mmol) and chromium trioxide (23 mg, 1.2 mol %) in wet acetonitrile (0.75% H2O) to a volume of 114 mL. This stock solution (0.3 mL) was added to a solution of (S)-2-tert-butoxy-2-(7-(4-chlorophenyl)-5-methyl-2-(2-(1-methyl-1H-indazol-6-yl)pyridin-5-yl)benzo[d]thiazol-6-yl)ethanol (15 mg, 0.027 mmol) in 0.75% H2O in ACN (3 mL). The reaction mixture was stirred at rt for 45 minutes, quenched with saturated Na2SO3 solution and extracted with EtOAc. The organic layer was dried (MgSO4), filtered, concentrated and purified by reverse phase HPLC (H2O/ACN+0.1% TFA) to give the desired product after lyophilization. LCMS-ESI+: calc'd for C33H30ClN4O3S: 597.2 (M+H+); found: 597.2, 599.2. 1H NMR (400 MHz, CD3OD) δ 9.13 (s, 1H), 8.98 (s, 1H), 8.67 (s, 1H), 8.16 (s, 1H), 8.12 (s, 1H), 7.92 (s, 1H), 7.83 (dd, J=8.8, 1.6 Hz, 1H), 7.73 (dd, J=13.4, 5.2 Hz, 2H), 7.60 (d, J=8.0 Hz, 3H), 5.27 (s, 1H), 4.11 (s, 3H), 2.63 (s, 3H), 0.98 (s, 9H) (115).

1. customquenched with saturated Na2SO3 solution
2. extractionextracted with EtOAc
3. dry with materialThe organic layer was dried (MgSO4)
4. filtrationfiltered
5. concentrationconcentrated
6. custompurified by reverse phase HPLC (H2O/ACN+0.1% TFA)