Reaktion #314939

Reaktionsgleichung

phenylboronic acid

1,4-dichloro-5,6,7,8-tetrahydrophthalazine

dioxane

Sodium carbonate

→

1-chloro-4-phenyl-5,6,7,8-tetrahydrophthalazine

Lösungsmittel

dichloromethane

EtOAc

water

brine

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe vessel was sealed
2. 2
   Sonstigeto give
3. 3
   Sonstigea homogenous brown reaction
4. 4
   Temperaturthe reaction was cooled to ambient temperature
5. 5
   SonstigeThe layers were separated
6. 6
   Trocknenthe organic layer was dried over anhydrous sodium sulfate
7. 7
   Filtrationfiltered
8. 8
   Einengenconcentrated in vacuo
9. 9
   Sonstigeto give a red solid
10. 10
    Sonstigepurified by silica gel chromatography (0-60% EtOAc in hexanes)

Vorschrift

1,1′-bis(diphenylphosphino)ferrocene-palladium dichloride (0.270 g, 0.369 mmol), phenylboronic acid (0.900 g, 7.38 mmol) and 1,4-dichloro-5,6,7,8-tetrahydrophthalazine (2.25 g, 11.1 mmol) were combined in a 150 mL sealable vessel under argon. 15 mL dioxane and 2.0 M Sodium carbonate, aqueous (7.38 ml, 14.8 mmol) were added. The vessel was sealed and heated to 80° C. to give a homogenous brown reaction. After 30 min, the reaction was cooled to ambient temperature and was diluted with EtOAc, water, and brine. The layers were separated, and the organic layer was dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo to give a red solid. This was taken up in dichloromethane and purified by silica gel chromatography (0-60% EtOAc in hexanes) to give 1-chloro-4-phenyl-5,6,7,8-tetrahydrophthalazine as an off-white solid. MS m/z=245 [M+H]+. Calc'd for C14H13ClN2: 244.7.

Quelle