Sodium Chloride → HCID 14999093, compound

Participants

Reaction Steps

5-Methyl-2-(3-pyridyl)thiazolidin-4-one (10 g, 51.5 mmol) and ethyl bromoacetate (6.85 ml, 61.8 mmol) were dissolved in dry dimethylformamide (50 ml), and 60% sodium hydride (2.16 g, 54.1 mmol) was added in limited amounts to the solution at 0° to 10° C. This reaction mixture was kept between those temperatures for 1 hour. The mixture, after addition of aqueous NaCl, was extracted with ethyl acetate. The extract was washed with aqueous NaCl, dried, and the solvent was removed in vacuo. The residue was chromatographed on silica gel, giving the cis-isomer (5.8 g) (compound No. 9) and the trans-isomer (2.1 g) (compound No. 10) of the title compound (55% yield). Compound No. 9: cis-isomer NMR (CDCl3, δ) [ppm]; 1.24 (3 H, t, J=7.2 Hz), 1.67 (3 H, d, J=7.1 Hz), 5.81 (1 H, s). IR (CHCl3) [cm-1 ]; 2950, 1740, 1683, 1587, 1575, 1441, 1370, 1014. Compound No. 10: trans-isomer NMR (CDCl3, δ) [ppm]; 1.25 (3 H, t, J=7.2 Hz), 1.68 (3 H, d, J=7.1 Hz), 5.83 (1 H, d, J=1.7 Hz). IR (CHCl3) [cm-1 ]; 2950, 1739, 1685, 1585, 1572, 1370, 1345, 1012.

Provenance & Evidence