反应详情

温度

80 °C

Intermediate B (10.0 g, 34.01 mmol) was dissolved in 15 mL of DMSO and 185 mL of tBuOH and Pd(OAc)2 (1.14 g, 5.1 mmol), DPPP (2.2 g, 5.1 mmol) and TEA (7.7 g, 76.5 mmol) were added. The solution was stirred at 80° C. for 10 h under CO (10 atm). The solvent was removed under reduced pressure and the residue was dissolved in EtOAc. The organic layer was washed with water and brine, dried with Na2SO4, purified by silica gel column (DCM:MeOH=20:1) to give (R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-5,6,7,8-tetrahydropteridine-2-carboxylic acid (compound I-245, 2.2 g) as a yellow solid.

1. customThe solvent was removed under reduced pressure
2. dissolutionthe residue was dissolved in EtOAc
3. washThe organic layer was washed with water and brine
4. dry with materialdried with Na2SO4
5. custompurified by silica gel column (DCM:MeOH=20:1)