Ethyl Acetate → HCID 44995557, compound

Participants

Reaction Conditions

Reaction Steps

Ethyl oxalyl chloride (7.8 g, 6.8 mL, 57 mmol) was added to a mixture of 3,4-dimethoxyaniline (4.4 g, 29 mmol) and K2CO3 (14 g, 140 mmol) in EtOAc (44 mL) and water (12 mL) at 0° C. After stirring at 0° C. for 10 min, water (18 mL) was added; whereupon the mixture was transferred to a separatory funnel and extracted with EtOAc (2×40 mL). The combined EtOAc were filtered through Na2SO4 and evaporated to about 30 mL. After addition of 2,2-dimethoxyethylamine (3.8 g, 3.9 mL, 36 mmol), the reaction was stirred at ambient temperature overnight. The resultant white solid was filtered and then washed with hexane to afford N1-(2,2-dimethoxyethyl)-N2-(3,4-dimethoxyphenyl)oxalamide as a light purple-grey solid (6.3 g, 71% yield). HPLC 33% 2.47 min and 63% at 2.79 min. LC MS 1.37 min (M+1=281 and 335). H-NMR (CDCl3) 9.15 (broad s, 1H), 7.76 (broad s, 1H), 7.41 (d, T=2.4 Hz, 1H), 7.06 (dd, J=2.4, 8.7 Hz, 1H), 6.85 (d, J=8.7 Hz, 1H), 4.45 (t, 5.5 Hz, 1H), 3.90 (s, 3H), 3.88 (s, 3H), 3.52 (t, J=5.5 Hz, 2H), 3.42 (s, 6H).

Provenance & Evidence