1,3-Propanediamine → N-(3-aminoprop-1-yl)-3,4-dichlorobenzylamine

To 1,3-diaminopropane (42 ml) in dry THF (200 ml) at 60° C. was added dropwise a solution of 3,4-dichlorobenzylchloride (13.9 ml, 100 mmol) in 90 ml dry THF over 3 h. The mixture was kept at 60° C. for an additional 15 min and then kept at 25° C. for 3 days. The precipitate was removed by filtration and the mother liquor concentrated in vacuo. The residue was partitioned between water and t-butyl methyl ether (TBME). To the organic layer was added aq. HCl (2 M) and the mixture was filtered. The layers were separated and NaOH was added to the aqueous layer with stirring. The resulting mixture was extracted with TBME and the organic extract was dried (Na2CO3), filtered, and the solvent evaporated to give the title compound as a slightly cloudy oil, (18.2 g, 78%). δH (CDCl3) 1.20 (br, s, ca. 3H), 1.58-1.71 (m, 2H), 2.67 (t, J=6.9, 2H), 2.78 (t, J=6.8, 2H), 3.74 (s, 2H), 7.15 (dd, J=8.2, 2.0, 1H), 7.37 (d, J=8.2, 1H), 7.43 (d, J=1.9, 1H); MS (ES+) 233 (MH+, 13%), 159 (100).

1. waitkept at 25° C. for 3 days
2. customThe precipitate was removed by filtration
3. concentrationthe mother liquor concentrated in vacuo
4. customThe residue was partitioned between water and t-butyl methyl ether (TBME)
5. additionTo the organic layer was added aq. HCl (2 M)
6. filtrationthe mixture was filtered
7. customThe layers were separated
8. additionNaOH was added to the aqueous layer
9. extractionThe resulting mixture was extracted with TBME
10. extractionthe organic extract
11. dry with materialwas dried (Na2CO3)
12. filtrationfiltered
13. customthe solvent evaporated

ORD record

ord-3409bdc02ad74574a3c89aab6894c1df

Source dataset

uspto-grants-2001_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06320051B1