Reacción #806272

Ecuación de reacción

ammonia

1-[bis(4-chlorophenyl)-methyl]azetidin-3-yl methylsulfonate

→

1-[bis(4-chlorophenyl)methyl]azetidin-3-ylamine

Disolventes

methanol

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrothe evaporation of the ammonia
2. 2
   Concentraciónfinally concentrated under reduced pressure (2.7 kPa)
3. 3
   Extracciónextracted with four times 500 cm3 of ethyl ether
4. 4
   LavadoThe combined organic phases are washed successively with twice 100 cm3 of distilled water and 100 cm3 of a saturated sodium chloride solution
5. 5
   Secadodried over magnesium sulfate
6. 6
   Filtraciónfiltered
7. 7
   Concentraciónconcentrated under reduced pressure (2.7 kPa)
8. 8
   OtroThe residue obtained
9. 9
   Otrois purified by flash chromatography on silica gel [eluant: dichloromethane/methanol (95/5 by volume)]

Procedimiento

1-[Bis(4-chlorophenyl)methyl]azetidin-3-yl-amine may be obtained in the following manner: 400 cm3 of a mixture of methanol and liquid ammonia (50/50 by volume) are added to 27 g of 1-[bis(4-chlorophenyl)-methyl]azetidin-3-yl methylsulfonate contained in an autoclave previously cooled to around −60° C. The reaction medium is then stirred at 60° C. for 24 hours and then abandoned in the open air to allow the evaporation of the ammonia and finally concentrated under reduced pressure (2.7 kPa). The residue is taken up in 500 cm3 of a 0.37 N aqueous sodium hydroxide solution and extracted with four times 500 cm3 of ethyl ether. The combined organic phases are washed successively with twice 100 cm3 of distilled water and 100 cm3 of a saturated sodium chloride solution, dried over magnesium sulfate, filtered and concentrated under reduced pressure (2.7 kPa). The residue obtained is purified by flash chromatography on silica gel [eluant: dichloromethane/methanol (95/5 by volume)]. 14.2 g of 1-[bis(4-chlorophenyl)methyl]azetidin-3-ylamine are obtained in the form of an oil which solidifies into a cream-colored solid.

Fuente