Triethylamine → 2-Diazonio-3-oxo-1-[(prop-2-en-1-yl)oxy]but-1-en-1-olate

Participants

Reaction Conditions

Reaction Steps

55.4 ml (0.4 mole - 2 equivalents) of triethylamine were added dropwise to a solution, which had been cooled to 0° C., of 28.43 g (0.2 mole) of allyl acetoacetate and 43.39 g (0.22 mole - 1.1 equivalents) of p-toluenesulphonyl azide in 400 ml of anhydrous acetonitrile. The mixture was stirred at 0° C. for 3.5 h, then 50 g of kieselguhr were added, evaporation in vacuo was carried out and then chromatography on 400 g of silica gel (toluene:ethyl acetate 96:4). 31.9 g (95%) of the title compound were obtained as a pale yellow oil, Rf: 0.36 (toluene:ethyl acetate 9:1).

Provenance & Evidence