反应详情

To a solution of 2-(5-(tert-butyldimethylsilyloxy)-1-methyl-1H-indazol-3-yl)-5-trityl-5H-pyrrolo[3,2-b]pyrazine-7-carboxylate (3.4 g, 4.9 mmol) in THF (25 mL) was added TBAF (6.42 mL, 12.85 mmol) at 0° C., after the addition was completed, the reaction mixture was warmed to room temperature and stirred for 0.5 hour, then H2O (25 mL) was added to the mixture extracted with EtOAc (100 mL), the organic layer was washed with H2O (100 mL), brine (100 mL), dried over Na2SO4, filtered and concentrated under reduced pressure to give methyl 2-(5-hydroxy-1-methyl-1H-indazol-3-yl)-5-trityl-5H-pyrrolo[3,2-b]pyrazine-7-carboxylate (3.2 g, >100%) as a yellow solid. LCMS: (M+H)+=566; (M+Na)+=588.

1. additionafter the addition
2. extractionextracted with EtOAc (100 mL)
3. washthe organic layer was washed with H2O (100 mL), brine (100 mL)
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure