Reaction #1102746

Reaction equation

(S)-1-(2-chloro-acetyl)pyrrolidine-2-carbonitrile

1-(3-aminotricyclo[3.3.1.03,7]non-1-yl)pyrrolidin-2-one

K2CO3

→

(2S)-1-{N-[2-(2-oxopyrrolidin-1-yl)hexahydro-2,5-methanopentalen-3a(1H)-yl]glycyl}pyrrolidine-2-carbonitrile

Yield 40.0%

Solvents

EtOAc

DMSO

Conditions

Workup

1. 1
   OtherUpon completion of the reaction (checked by TLC)
2. 2
   Washwashed with water and brine
3. 3
   Dryingdried over Na2SO4
4. 4
   Otherthe solvent was removed under reduced pressure
5. 5
   OtherThe crude product was purified by column chromatography

Procedure

To a stirred mixture of 1-(3-aminotricyclo[3.3.1.03,7]non-1-yl)pyrrolidin-2-one prepared as in preparation 9 (0.25 g, 1.1 mmol) and K2CO3 (0.46 g, 3.3 mmol) in DMSO (5 mL) at an ice bath temperature was added (S)-1-(2-chloro-acetyl)pyrrolidine-2-carbonitrile (0.2 g, 1.1 mmol). The reaction mixture was gradually warmed to room temperature and stirred for 3 h. Upon completion of the reaction (checked by TLC), the reaction mixture was diluted with EtOAc and washed with water and brine, dried over Na2SO4, and the solvent was removed under reduced pressure. The crude product was purified by column chromatography to obtain (2S)-1-{N-[2-(2-oxopyrrolidin-1-yl)hexahydro-2,5-methanopentalen-3a(1H)-yl]glycyl}pyrrolidine-2-carbonitrile as a viscous liquid (0.16 g) in 40% yield. m/z (M+1) 357; 1H NMR (CDCl3) 300 MHz δ 4.78 (d, J=7.4 Hz, 1H), 3.70-3.38 (m, 2H), 3.46 (s, 2H), 3.41 (t, J=7.0 Hz, 2H), 2.60 (dd, J=4.0, 10.2 Hz, 1H), 2.40-1.75 (m, 17H), 1.72-1.62 (m, 1H), 1.58-1.50 (m, 1H).

Source