g in sesame oil or olive oil the invention is described more in detail in the following text in reference to specific examples the compounds of the invention listed in the following examples are tested by means of thin layer chromatography in regard to purity benzene methanol solvent 9 1 dc finished plates silica gel 60f 254 thickness of layer 0 25 mm firm e merck darmstadt detection agent uv 254 and secured structurally through 1 h nmr spectroscopy 60 mhz the chemical shifts are indicated in ppm in relation to tetramethyl silane tms u03b4 0 0 the relative intensities are added in brackets singlet s doublet d triplet t quartet q multiplet m to 166 2 g 1 mol of methyl magnesium iodide in 150 ml absolute ether one admixes by drops during stirring a solution of 108 9 g 0 8 mol 3 39 methoxybenzaldehyde in 200 ml ether and the material is heated for 30 minutes under reflux then the mixture is poured onto ice and the precipatate of magnesium hydroxide is dissolved with 5 n hcl the ether phase is separated the water phase is extracted with ether a number of times the combined organic phases are washed with saturated solution of sodium sulfite then with 10 solution of sodium hydrogencarbonate and finally with water dried and concentrated in vacuo under distillation the residue produces a colorless oil boiling point 124 u00b0 c 11 mm hg hrf 61 yield 103 9 g 85 4 of the theory 1 h nmr spectrum ccl 4 1.