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

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).

1. customUpon completion of the reaction (checked by TLC)
2. washwashed with water and brine
3. dry with materialdried over Na2SO4
4. customthe solvent was removed under reduced pressure
5. customThe crude product was purified by column chromatography

ORD record

ord-cec57454dfe74beb9760b57434b8c551

Source dataset

uspto-grants-2011_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07985759B2