Reaktion #88701

Reaktionsgleichung

4-chlorobenzaldehyde

6-((5-fluoropyridin-3-yl)oxy)-1-methyl-3-(3-((tetrahydro-2H-pyran-2-yl)oxy) propyl)pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione

LDA

→

5-((4-chlorophenyl)(hydroxy)methyl)-6-((5-fluoropyridin-3-yl)oxy)-1-methyl-3-(3-((tetrahydro-2H-pyran-2-yl)oxy)propyl)pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione

Ausbeute 25.1%

Lösungsmittel

EA

water

THF

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGThe reaction was stirred for 30 min at −78° C.
2. 2
   TrocknenThe organic layer was dried over Na2SO4
3. 3
   Einengenconcentrated to a residue which
4. 4
   Sonstigewas purified by Prep TLC
5. 5
   Wascheneluted with PE/EA (1:1)

Vorschrift

To a solution of 6-((5-fluoropyridin-3-yl)oxy)-1-methyl-3-(3-((tetrahydro-2H-pyran-2-yl)oxy) propyl)pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione (150 mg, 0.35 mmol) in THF (8 mL) at −78° C. was added LDA (2M in THF, 0.7 mL, 1.40 mmol) dropwise. The reaction was stirred at −78° C. for 1 h then 4-chlorobenzaldehyde (98 mg, 0.70 mmol) in THF (2 mL) was added. The reaction was stirred for 30 min at −78° C. then diluted with EA (10 mL) and water (10 mL). The organic layer was dried over Na2SO4 and concentrated to a residue which was purified by Prep TLC eluted with PE/EA (1:1) to give 5-((4-chlorophenyl)(hydroxy)methyl)-6-((5-fluoropyridin-3-yl)oxy)-1-methyl-3-(3-((tetrahydro-2H-pyran-2-yl)oxy)propyl)pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione (50 mg, 25.1% yield) as an oil. LCMS: [MH+-THP] 487 and TR=1.423 min. Used without further purification.

Quelle