Ethanol → HCID 20271288, compound

Participants

Reaction Steps

Crude sodium 2-(4-pyridylmethylthio)propionate (approximately 7 g.) was taken up in 100 ml. of absolute ethanol and approximately 5 cc. of 3 A molecular sieves were added. Dry hydrogen chloride was bubbled into the reaction mixture, which was refluxed for 75 minutes, while continuing to saturate with hydrogen chloride during the initial 15 minutes. The mixture was cooled to room temperature and allowed to stir overnight (approximately 16 hours). The mixture was filtered through diatomaceous earth and concentrated to a semi-solid mixture. The esterification step was repeated on this mixture, except saturation with hydrogen chloride was continued during 1 hour of reflux and refluxing was continued overnight. The reaction mixture was cooled to room temperaure, filtered through diatomaceous earth and evaporated to an oil. The oil was extracted with chloroform, leaving filterable salts behind, and the chloroform stripped to yield ethyl 2-(4-picolylthio)propionate (waxy solid; ir (KBr) 3.0, 3.5, 5.75, 6.15, 6.30, 6.70, 8.6, 12.25μ; m.s.: m/e calcd: 225, found: 225, 152, 124, 102, 92, 45).

Provenance & Evidence