Dimethylalumanylium chloride → HCID 66580196, compound

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Reaction Steps

4-((R)-2,2,2-Trifluoro-1-methyl-ethoxy)-phenylamine (7.57 g,) was added to a solution of 4-hydroxy-1-(2-methoxy-ethyl)-cyclohexanecarboxylic acid ethyl ester (5.0 g, obtained in example 3, step 3) in toluene (150 ml). The mixture was stirred for 10 minutes at RT. Then, dimethylaluminiumchloride (1M in hexane, 65.1 mL) was added dropwise over a period of 45 minutes. The reaction mixture was heated to reflux for 2 h and was then kept at 95° C. for 16 h. The mixture was cooled, poured into ice/water and extracted two times with ethyl acetate. The combined organic layers were washed with brine, dried over Na2SO4, filtered and the solvent was evaporated. The title compound was obtained as an mixture of cis and trans diastereomers as a light brown solid (5.79 g). This mixture was used without further purification. MS (m/e): 358.3 [MH+].

Provenance & Evidence