Hydrochloric Acid → (2R)-2-(1-hydroxy-1-(3-methoxyphenyl)methyl]cyclohexanone

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of (R,R)-mono(2,6-dimethoxybenzoyl)tartaric acid (314 mg) in propionitrile (5 ml) was added 1M BH3 solution (1.0 ml) in tetrahydrofuran at 0° C. under N2. The reaction mixture was stirred for 1 hour at 0° C., and then the solution was cooled to -78° C. To this were added 1-(trimethylsilyl-oxy)cyclohexene (1.0 g) and 3-methoxybenzaldehyde (680 mg) successively. After stirring for 2 hours, the solution was poured into 1N-hydrochloric acid and the product was extracted with ether. The solvent was evaporated, and the residue was treated with 1N-hydrochloric acid-tetrahydrofuran solution (2 ml, 1:1). Usual chromatographic separation gave (2R)-2-(1-hydroxy-1-(3-methoxyphenyl)methyl]cyclohexanone (350 mg).

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