Pyridine → 3-(6-Methyl-pyridin-2-yl)-3-(2-oxo-pyrrolidin-1-ylimino)-propionic Acid Ethyl Ester

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Reaction Steps

Add 1-aminopyrrolidin-2-one hydrochloride (Zubek, A. Z. Chem. 1969, 9(2), 58; 99.4 g, 0.73 mol) to a 3 L flask equipped with mechanical stirrer and nitrogen inlet. Add 3-[6-methyl-(pyridin-2-yl)]-3-oxo-propionic acid ethyl ester (Preparation 1, Part A; 154 g, 0.66 mol), and pyridine (280 mL). Stir the reaction mixture at room temperature for 20 h. Dilute the mixture with water (200 mL) and extract with toluene (2×250 mL). Combine the organic layers, filter, and concentrate in vacuo to yield the subtitled product (201 g) as a dark oil. MS (ES) m/z=290 (M+H).

Provenance & Evidence