Reacción #6926

Ecuación de reacción

(4-Benzyloxyphenyl)-(6-chloro-pyrido[3,4-d]pyrimidin-4-yl)-amine

5-(1,3-dioxolan-2-yl)-2-(tributylstannyl)furan

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product

Rendimiento 52.0%

5-(4-(4-Benzyloxy-phenylamino)-pyrido[3,4-d]pyrimidin-6-yl)-furan-2-carbaldehyde

Rendimiento 52.0%

Disolventes

HCl

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturato cool
2. 2
   FiltraciónThe reaction was filtered
3. 3
   Lavadothe residue washed with dioxane (20 ml) and 2N HCl (20 ml)
4. 4
   workup.STIRRINGThe combined filtrate and washings were stirred at room temperature for a further hour
5. 5
   OtroThe dioxane was removed under vacuum
6. 6
   workup.ADDITIONthe reaction diluted with water
7. 7
   Otrothe solid which precipitated
8. 8
   Filtraciónwas collected by filtration
9. 9
   Lavadowashed with water, iso-hexane and acetone
10. 10
    Otroby partitioning into a mixture of triethylamine, ethyl acetate and water
11. 11
    LavadoThe organic phase was washed with water
12. 12
    Secadodried (magnesium sulphate)
13. 13
    Otrothe solvent removed under vacuum
14. 14
    OtroThe residue was triturated with iso-hexane/ethyl acetate

Procedimiento

(4-Benzyloxyphenyl)-(6-chloro-pyrido[3,4-d]pyrimidin-4-yl)-amine (4.0 g, 11.0 mmol), 5-(1,3-dioxolan-2-yl)-2-(tributylstannyl)furan (J. Chem. Soc., Chem. Commun., (1988), 560) (6.0 g, 14.0 mmol) were reacted together in a procedure analogous to Procedure B above for 20 hrs. The reaction mixture was allowed to cool, 1N HCl (50 ml) added and stirred at room temperature for 15 minutes. The reaction was filtered and the residue washed with dioxane (20 ml) and 2N HCl (20 ml). The combined filtrate and washings were stirred at room temperature for a further hour. The dioxane was removed under vacuum, the reaction diluted with water and the solid which precipitated was collected by filtration, and washed with water, iso-hexane and acetone. This precipitate was converted to the free base by partitioning into a mixture of triethylamine, ethyl acetate and water. The organic phase was washed with water, dried (magnesium sulphate) and the solvent removed under vacuum. The residue was triturated with iso-hexane/ethyl acetate to give the product (2.41 g, 52%) as a yellow solid; δH [2H6]-DMSO 10.60 (1H, b, NH), 9.83 (1H, s, CHO), 9.30 (1H, s, 2-H), 9.08 (1H, s, 5-H or 8-H), 8.76 (1H, s, 5-H or 8-H), 7.89 (1H, d, furan-H), 7.82 (2H, d, 2′-H, 6′-H), 7.65–7.42 (6H, m, 5×Ph-H, furan-H), 7.21 (2H, d, 3′-H, 5′-H), 5.26 (2H, s, OCH2); m/z (M+1)+423.

Fuente