Sodium Cyanide → HCID 45087749, Verbindung

KCN (886 mg, 13.6 mmols), NaCN (666 mg, 13.6 mmols) and 18-crown-6 (207 mg, 1.02 mmols) were added to a CH3CN (25 ml) solution of the (5S)-5-(bromomethyl)-1-methylpyrrolidin-2-one (1.31 g, 6.8 mmols), and the mixture was heated for 43 hours under reflux. The inorganic matter was filtered off, and the filtrate was diluted with AcOEt (50 ml). The dilution was washed with a saturated solution (30 ml) of NaCl, and dried over MgSO4. The solvent was distilled off under reduced pressure, and then the residue was subjected to silica gel column chromatography (SiO2 50 g, MeOH—CHCl3 1:9 v/v) to obtain 2-((2S)-1-methyl-5-oxopyrrolidin-2-yl)ethanenitrile as a mixture (1.05 g) with impurities difficult to separate: IR νmax (film) cm−1: 2246, 1685. 1H-NMR (CDCl3)δ: 3.85-3.76 (1H, m), 2.88 (3H, s), 2.68 (1H, dd, J=17.0, 4.4 Hz), 2.61 (1H, dd, J=17.0, 6.0 Hz), 2.62-2.48 (1H, m), 2.46-2.30 (2H, m), 2.00-1.86 (1H, m). MS m/z: 138 (M+), 98 (100%). HRMS: Calcd. for C7H10N2O: 138.0793 (M+). Found: 138.0794 (M+).

1. temperaturethe mixture was heated for 43 hours
2. temperatureunder reflux
3. filtrationThe inorganic matter was filtered off
4. additionthe filtrate was diluted with AcOEt (50 ml)
5. washThe dilution was washed with a saturated solution (30 ml) of NaCl
6. dry with materialdried over MgSO4
7. distillationThe solvent was distilled off under reduced pressure

ORD-Eintrag

ord-4e3939a3260d420fb634237546827821

Quelldatensatz

uspto-grants-2005_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06949553B2