Sodium Bicarbonate → methyl 4-[(2S,4R)-1-acetyl-2-methyl-4-({[(1-methylethyl)oxy]carbonyl}amino)-1,2,3,4-tetrahydro-6-quinolinyl]-3-methylbenzoate

温度

100 °C

A flask was charged with methyl 3-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate (0.449 g, 1.625 mmol), 1-methylethyl[(2S,4R)-1-acetyl-6-bromo-2-methyl-1,2,3,4-tetrahydro-4-quinolinyl]carbamate (for a preparation see Intermediate 100) (0.5 g, 1.354 mmol), sodium bicarbonate (saturated solution) (1.5 mL, 1.354 mmol) and bis(diphenylphosphino)ferrocene]dichloropalladium(II)-DCM adduct (0.111 g, 0.135 mmol) then filled with 1,4-dioxane (7 mL). The resulting mixture was degassed by bubbling nitrogen in to it, stirred at 100° C. for 1 hr under microwave irradiation then cooled to room temperature. The reaction mixture was filtered through celite and concentrated in vacuovacuo. The residue was partitioned between EtOAC (30 mL) and water (30 mL) and the layers were separated. The organic phase was washed with brine (25 mL) dried over MgSO4 and concentrated in vacuovacuo. Purification of the residue by flash chromatography on silica gel (gradient:0 to 60% AcOEt in Hexanes) gave methyl 4-[(2S,4R)-1-acetyl-2-methyl-4-({[(1-methylethyl)oxy]carbonyl}amino)-1,2,3,4-tetrahydro-6-quinolinyl]-3-methylbenzoate (337 mg, 0.769 mmol, 56.8%) as a light yellow solid.

1. customThe resulting mixture was degassed
2. customby bubbling nitrogen in to it
3. temperaturethen cooled to room temperature
4. filtrationThe reaction mixture was filtered through celite and
5. concentrationconcentrated in vacuovacuo
6. customThe residue was partitioned between EtOAC (30 mL) and water (30 mL)
7. customthe layers were separated
8. washThe organic phase was washed with brine (25 mL)
9. dry with materialdried over MgSO4
10. concentrationconcentrated in vacuovacuo
11. customPurification of the residue by flash chromatography on silica gel (gradient:0 to 60% AcOEt in Hexanes)

ORDレコード

ord-4bb35b36c75a4ff7abf2aaec37877c64

出典データセット

uspto-grants-2013_11

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08580957B2