Trimethylamine → 1-(Naphthalene-1-sulfonyl)-pyrrolidin-3-ylamine

To a solution of l-naphthalenesulfonyl chloride (1,0 g, 5.4 mmol) in 50 ml of CH2Cl2 with 2 ml of trimethylamine was added 3-t-butoxycarbonylpyrrolidine (1.5 g, 6.5 mmol) in a portion and the resulting solution was stirred at reflux for 48 h. Reaction mixture was concentrated in vacuo, yielding oily mixture which was partioned between 100 ml of EtOAc and NaHCO3 sat'd aqueous solution. Organic layer was separated, dried over Na2SO4 and concentrated in vacuo to provide an oil, which was redissolved in 20 ml of CH2Cl2. Toward this solution was added 1 ml of trifluoroacetic acid and the resulting solution was stirred for 2 h at 25° C. Reaction mixture was concentrated in vacuo, providing a brown oil, which was dissolved in EtOAc and washed with aqueous NaOH, Organic layer was concentrated in vacuo to yield an oil which was subjected to column chromatography (30% MeOH/CHCl3) to provide 0.17 g (23%) of the desired product.

1. temperatureat reflux for 48 h
2. customReaction mixture
3. concentrationwas concentrated in vacuo
4. customyielding oily mixture which
5. customOrganic layer was separated
6. dry with materialdried over Na2SO4
7. concentrationconcentrated in vacuo
8. customto provide an oil, which
9. stirringthe resulting solution was stirred for 2 h at 25° C
10. customReaction mixture
11. concentrationwas concentrated in vacuo
12. customproviding a brown oil, which
13. washwashed with aqueous NaOH, Organic layer
14. concentrationwas concentrated in vacuo
15. customto yield an oil which

ORD record

ord-613049ec2bb14005bc715b85f48625fe

Source dataset

uspto-grants-2002_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06391877B1