Reaktion #164585

Reaktionsgleichung

Triethylamine

2-(6-(1,4-Diazabicyclo[3.2.2]nonan-4-yl)-2-(3-chlorophenyl)-4-oxoquinazolin-3(4H)-yl)acetic acid

Intermediate 11A

2-(6-(1,4-Diazabicyclo[3.2.2]nonan-4-yl)-2-(3-chlorophenyl)-4-oxoquinazolin-3(4H)-yl)acetic acid

dimethylamine hydrochloride

1-propanephosphonic acid cyclic anhydride

ethyl acetate

→

2-(6-(1,4-diazabicyclo[3.2.2]nonan-4-yl)-2-(3-chlorophenyl)-4-oxoquinazolin-3(4H)-yl)-N,N-dimethylacetamide

Ausbeute 10.9%

Lösungsmittel

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeto form a suspension
2. 2
   Sonstigethe resulting reaction mixture
3. 3
   SonstigeReaction mixture
4. 4
   Waschenwas washed with sodium bicarbonate solution
5. 5
   Sonstigethe organics were separated
6. 6
   SonstigeThe solvent was removed under reduced pressure
7. 7
   workup.DISSOLUTIONre-dissolved in methanol (1 mL)
8. 8
   Sonstigepurified by preparative-HPLC

Vorschrift

2-(6-(1,4-Diazabicyclo[3.2.2]nonan-4-yl)-2-(3-chlorophenyl)-4-oxoquinazolin-3(4H)-yl)acetic acid (Intermediate 11A) (49 mg, 0.11 mmol) and dimethylamine hydrochloride (18.2 mg, 0.22 mmol) were weighed into a round bottomed flask and dichloromethane (1 mL) added to form a suspension. Triethylamine (33.8 mg, 0.33 mmol) was added and the suspension stirred for 5 minutes before dropwise addition of 1-propanephosphonic acid cyclic anhydride as a 50% wt solution in ethyl acetate (107 mg, 0.17 mmol) and the resulting reaction mixture stirred for 2 hours. Reaction mixture was washed with sodium bicarbonate solution and the organics were separated using a hydrophobic frit. The solvent was removed under reduced pressure and then re-dissolved in methanol (1 mL) and purified by preparative-HPLC. To afford the title compound 2-(6-(1,4-diazabicyclo[3.2.2]nonan-4-yl)-2-(3-chlorophenyl)-4-oxoquinazolin-3(4H)-yl)-N,N-dimethylacetamide (5.4 mg, 0.012 mmol).

Quelle