Triethylamine → HCID 178465532, compound

Participants

Reaction Steps

A mixture of 1 g (3.1 mmol) of 3-butoxy-4-(1,3,3-trimethyl-2,3-dihydro-1H-2-indolylidenmethyl)-3-cyclobutene-1,2-dione (18), 200 mg (4.8 mmol) of cyanamide and 0.5 ml (3.6 mmol) of triethylamine is refluxed with stirring in 10 ml of absolute ethanol for 12 h. The solvent is removed under reduced pressure by a rotary evaporator. The obtained gum is column purified (Silica gel 60, 0–5% methanol-chloroform) to give triethylammonium-3-cyanimino-4-oxo-2-(1,3,3-trimethyl-2,3-dihydro-1H-2-indolylidenmethyl)-1-cyclobuten -1-olate (19) as an oily, yellow solid. Yield: 0.96 g (78%).

Provenance & Evidence