Reacción #1605768

Ecuación de reacción

oxime

5-methoxy-2,3-dihydroinden-1-one oxime

ammonia

→

amine

Rendimiento 45.0%

5-methoxy-2,3-dihydro-1H-inden-1-amine

Rendimiento 45.0%

Disolventes

MeOH

MeOH

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrowas used in the next step without further purification
2. 2
   FiltraciónThe slurry was filtered over celite and
3. 3
   Concentraciónconcentrated in vacuo
4. 4
   workup.ADDITIONdiluted with EtOAc
5. 5
   Lavadowashed with water and brine
6. 6
   Secadodried over MgSO4
7. 7
   Filtraciónfiltered
8. 8
   Concentraciónconcentrated in vacuo

Procedimiento

5-Methoxy-2,3-dihydromden-1-one (Ig, 6.17 mmol) was added to a solution of hydroxylamine HCl (730 mg, 10.5 mmol) in 10 ml of water. The mixture was brought up to 70° C. and a solution of sodium acetate (1.4 g, 16.7 mmol) in 7 mL of H2O, 14 ml of MeOH, 3 ml of THF was added. After stirring for 1.5 h at 70° C., 10 ml of H2O was added to produce a precipitate and the suspension was allowed to stir for 2 h. The precipitate was collected by filtration to give 5-methoxy-2,3-dihydroinden-1-one oxime almost quantitatively and was used in the next step without further purification. The oxime (0.5 g, 2.82 mmol) was dissolved in MeOH and a catalytic amount of Raney nickel and 25 mL of ammonia solution in MeOH (7N) was added. The reaction was stirred at r.t. overnight under H2. The slurry was filtered over celite and concentrated in vacuo, diluted with EtOAc, washed with water and brine, dried over MgSO4, filtered, and concentrated in vacuo to give the crude title amine (yield, 45%). The crude amine was used without further purification.

Fuente