Reacción #2275691

Ecuación de reacción

ethylacetate

acetic acid {3-chlorocarbonyl-5-[(2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)-carbamoyl]-2,4,6-triiodo-phenylcarbamoyl}-methyl ester

5-[Acetyl-(3-amino-2-hydroxy-propyl)-amino]-N-(2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)-N′-(dimethyl-[1,3]dioxolan-4-ylmethyl)-2,4,6-triiodo-isophthalamide

triethylamine

→

acetic acid {3-[3-(acetyl-{3,5-bis-[(2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)-carbamoyl]-2,4,6-triiodo-phenyl}-amino)-2-hydroxy-propylcarbamoyl]-5-[(2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)-carbamoyl]-2,4,6-triiodo-phenylcarbamoyl}-methyl ester

Rendimiento 33.0%

Disolventes

DMF

Condiciones de reacción

Tratamiento posterior

1. 1
   Lavadowashed with water
2. 2
   OtroThe organics were collected
3. 3
   Secadodried over MgSO4
4. 4
   Filtraciónfiltered
5. 5
   Otroevaporated to dryness
6. 6
   OtroThe product was purified by silica column chromatography
7. 7
   Lavadoeluting with ethylacetate/MeOH

Procedimiento

To a solution of 5-[Acetyl-(3-amino-2-hydroxy-propyl)-amino]-N-(2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)-N′-(dimethyl-[1,3]dioxolan-4-ylmethyl)-2,4,6-triiodo-isophthalamide (2.0 g, 2 mmol) in DMF (4 mL) were added triethylamine (0.45 g, 4 mmol, 2 eq) followed by acetic acid {3-chlorocarbonyl-5-[(2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)-carbamoyl]-2,4,6-triiodo-phenylcarbamoyl}-methyl ester (1.85 g, 2 mmol, 1 eq). The reaction mixture was stirred at room temperature overnight under nitrogen. The mixture was diluted with ethylacetate and washed with water. The organics were collected, dried over MgSO4, filtered and evaporated to dryness. The product was purified by silica column chromatography eluting with ethylacetate/MeOH to give acetic acid {3-[3-(acetyl-{3,5-bis-[(2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)-carbamoyl]-2,4,6-triiodo-phenyl}-amino)-2-hydroxy-propylcarbamoyl]-5-[(2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)-carbamoyl]-2,4,6-triiodo-phenylcarbamoyl}-methyl ester (725 μmol, Yield=33%).

Fuente