Ammonia → (Hexahydro-1H-pyrrolizin-7A-YL)methanamine

Temperature

20 °C

To a homogenous solution of 7a-nitromethyl-2,3,5,6,7,7a-hexahydro-1H-pyrrolizine (1.00 g, 5.88 mmol) and NaOH (0.235 g (5.88 mmol) in 5 ml of ethanol, 0.40 g of Raney nickel were added to stir the mixture under hydrogen atmosphere at 20° C. for 12 hours. The catalyst was filtered off, and then the filtrate was poured into 33% HCl/ipropanol (5.0 ml) below 20° C. The reaction mixture was evaporated to dryness to give crude crystal. The crude crystal was suspended in toluene (5.0 ml) and to the suspension was introduced NH3 gas to stir at 20° C. for 12 hours. The precipitate was filtered off and the filtrate was evaporated to afford 716 mg of the desired compound (Yield: 86.9%).

1. filtrationThe catalyst was filtered off
2. additionthe filtrate was poured into 33% HCl/ipropanol (5.0 ml) below 20° C
3. customThe reaction mixture was evaporated to dryness
4. customto give crude crystal
5. stirringto stir at 20° C. for 12 hours
6. filtrationThe precipitate was filtered off
7. customthe filtrate was evaporated

ORD record

ord-e1624f0c3fa944239a90125ab3981090

Source dataset

uspto-grants-1991_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04985569