Ethylenediamine → P-Cymene

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To mixture of ethylenediamine (525 mmol, 31.6 g, 35.2 ml), anhydrous FeCl3 (0,964 mmol, 0.16 g) and sodium (145 mmol, 3.34 g) was heated to about 50° C. under N2. After sodium dissolution had started, as evidenced by hydrogen evolution and formation of a dark solution, α-limonene (742 mmol, 101 g, 120 ml), certified as derived from biomass (obtained from Sigma-Aldrich (St. Louis, Mo.), was added dropwise into the mixture and the mixture heated to 100° C. The mixture was heated at 100° C. for 8 h. The mixture was then cooled down and diluted with water (300 ml) and extracted two times with dichloro methane (DCM) (300 ml). The organic layers were dried over magnesium sulfate and concentrated using a rotary evaporator obtaining the crude para-cymene product. Yield: 99% (purity 99%)

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