Reaktion #1572726

Reaktionsgleichung

6-chloro-4-(tetrahydro-2H-pyran-4-yloxy)pyrido[3,2-d]pyrimidine

Intermediate 1

6-chloro-4-(tetrahydro-2H-pyran-4-yloxy)pyrido[3,2-d]pyrimidine

N-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)benzenesulfonamide

Intermediate 2

N-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)benzenesulfonamide

NaHCO3

→

N-(5-(4-(tetrahydro-2H-pyran-4-yloxy)pyrido[3,2-d]pyrimidin-6-yl)pyridin-3-yl)benzenesulfonamide

Ausbeute 19.1%

Lösungsmittel

1,4-dioxane

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeirradiation for 30 min at 120° C.
2. 2
   FiltrationThe reaction mixture was filtered through a Celite pad
3. 3
   Waschenwashed with EtOAc
4. 4
   workup.ADDITIONThe filtrate was diluted with water
5. 5
   Extraktionextracted with EtOAc
6. 6
   WaschenThe combined organic layers were washed with brine
7. 7
   Trocknendried over anhydrous Na2SO4
8. 8
   Filtrationfiltered
9. 9
   Einengenconcentrated in vacuo
10. 10
    SonstigeThe residue was purified by column chromatography on SiO2 (Hex:EtOAc=3:1)

Vorschrift

To a solution of 6-chloro-4-(tetrahydro-2H-pyran-4-yloxy)pyrido[3,2-d]pyrimidine (Intermediate 1) (60.0 mg, 0.226 mmol) in 1,4-dioxane (1.20 mL) was added N-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)benzenesulfonamide (Intermediate 2) (122 mg, 0.339 mmol), PdCl2(dppf)2CH2Cl2 (18.0 mg, 0.0230 mmol), and 1N aq. NaHCO3 (0.452 mL, 0.452 mmol) at room temperature. The reaction mixture was subjected to microwave irradiation for 30 min at 120° C., and cooled to room temperature. The reaction mixture was filtered through a Celite pad and washed with EtOAc. The filtrate was diluted with water and extracted with EtOAc. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered and concentrated in vacuo. The residue was purified by column chromatography on SiO2 (Hex:EtOAc=3:1) to give N-(5-(4-(tetrahydro-2H-pyran-4-yloxy)pyrido[3,2-d]pyrimidin-6-yl)pyridin-3-yl)benzenesulfonamide (20.0 mg, 19%) as a yellow solid. 1H-NMR (CDCl3, Varian 400 MHz) δ 2.02-2.11 (2H, m), 2.23-2.27 (2H, m), 3.68-3.74 (2H, m), 4.10-4.15 (2H, m), 5.64-5.69 (1H, m), 7.07 (1H, brs), 7.47-7.51 (2H, m), 7.56-7.60 (1H, m), 7.85-7.88 (2H, m), 8.21 (1H, d, J=8.8 Hz), 8.36 (1H, d, J=8.8 Hz), 8.38 (1H, s), 8.43 (1H, t, J=2.2 Hz), 8.83 (1H, s), 9.16 (1H, s); m/z=464.2 [M+1]+.

Quelle