Diethyl Oxalate → HCID 57565017, compound

Participants

Reaction Steps

Reaction of the adduct of diethyl oxalate (5.71 g, 39.1 mmol), ethyl benzyloxyacetate (7.59 g, 39.1 mmol) and sodium hydride (1.71 g of a 60% dispersion in mineral oil, 42.7 mmol) with 1-butyl-4,5-dihydro-1H-imidazol-2-amine hydrobromide (8.68 g, 39.1 mmol) as described for intermediate 1 gave 5.55 g (38% yield) of the title ester as a clear oil. 1HNMR 400 MHz (CDCl3) δ (ppm): 0.98 (3H, t, J=7.5 Hz, CH3), 1.31 (3H, t, J=7.1 Hz, CH3), 1.39 (2H, m, CH2), 1.56-1.63 (2H, m, CH2), 3.41 (2H, t, J=7.4 Hz, CH2), 3.69 (2H, t, J=8.9 Hz, CH2), 4.12 (2H, t, J=8.9 Hz, CH2), 4.32 (2H, q, J=7.1 Hz, OCH2), 5.09 (2H, s, OCH2), 7.3-7.4 (3H, m, aromatics), 7.49 (2H, m, aromatics). MS (ESI+) m/e 372 [M+H+].

Provenance & Evidence