Reaktion #62029

Reaktionsgleichung

N-((3R)-1-azabicyclo[2.2.2]oct-3-yl)-5-(bromo)benzo[d]isothiazole-3-carboxamide

caesium bicarbonate

(2′-dicyclohexylphosphanylbiphenyl-2-yl)dimethylamine

→

6-morpholin-4-ylbenzo[d]isothiazole-3-carboxylic acid ((3R)-1-azabicyclo[2.2.2]oct-3-yl)amide

Ausbeute 180.3%

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe vial was then evacuated
2. 2
   workup.ADDITIONback-filled with argon gas
3. 3
   workup.ADDITIONThe mixture of solids
4. 4
   workup.ADDITIONwas then diluted with morpholine (0.7 mL), dioxane (1 mL), and triethylamine (0.5 mL)
5. 5
   Sonstigethe reaction vessel was sealed
6. 6
   Sonstigeirradiation at 120° C. for 1800 s
7. 7
   FiltrationThe reaction mixture was filtered through a plug of celite and
8. 8
   Einengenconcentrated in vacuo
9. 9
   SonstigeThe crude product was purified by chromatography (90/10/1 dichloromethane/methanol/ammonium hydroxide)

Vorschrift

In a 5 mL microwave reaction vessel was added N-((3R)-1-azabicyclo[2.2.2]oct-3-yl)-5-(bromo)benzo[d]isothiazole-3-carboxamide (133 mg, 0.37 mmol), tris(dibenzylideneacetone)dipalladium (0) (34 mg, 0.04 mmol), caesium bicarbonate (213 mg, 1.1 mmol), and (2′-dicyclohexylphosphanylbiphenyl-2-yl)dimethylamine (30 mg, 0.07 mmol). The vial was then evacuated and back-filled with argon gas. The mixture of solids was then diluted with morpholine (0.7 mL), dioxane (1 mL), and triethylamine (0.5 mL) and the reaction vessel was sealed. The reaction mixture was subjected to microwave irradiation at 120° C. for 1800 s. The reaction mixture was filtered through a plug of celite and concentrated in vacuo. The crude product was purified by chromatography (90/10/1 dichloromethane/methanol/ammonium hydroxide) to provide 47 mg (34%) of 6-morpholin-4-ylbenzo[d]isothiazole-3-carboxylic acid ((3R)-1-azabicyclo[2.2.2]oct-3-yl)amide as a colorless solid.

Quelle