反应详情

温度

80 °C

A mixture of ethyl 1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridine-5-carboxylate (2 g, 4.30 mmol), LiOH (901 mg, 21.48 mmol), water (4 mL) and methanol (8 mL) was heated in a microwave oven for about 20 min at about 80° C. The reaction mixture was diluted with water and then washed with ethyl acetate to get rid of starting material. The aqueous layer was then acidified with 2N HCl, saturated with brine and then extracted with a mixture of DCM and IPA (3:1 ratio) twice. The combined organic layer was dried under vacuum to give the crude product. It was then triturated with ether to give pure product 1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid as a yellow solid (2.78 g, 95%). LC-MS m/z 319 (M+H)+.

1. washwashed with ethyl acetate
2. customto get
3. extractionextracted with a mixture of DCM and IPA (3:1 ratio) twice
4. customThe combined organic layer was dried under vacuum
5. customto give the crude product
6. customIt was then triturated with ether