反应详情

1.06 g (6.43 mmole) of 4-methoxybenzoyl chloride were dissolved in 4 ml methylene chloride, and 870 mg (8.57 mmole) triethylamine were added at −10° C. (methanol/ice cooling bath). 1.0 g (4.29 mmole) of the 2-(dimethylaminophenylmethyl)cyclohexanol prepared according to Example 2 (1st stage), dissolved in 2 ml methylene chloride, was then added dropwise, and the mixture was subsequently stirred for 15 hours. For working up, 2 ml potassium hydroxide solution (0.5 N) were added, and the organic phase was separated, dried over sodium sulfate, filtered and concentrated on a rotary evaporator (500 to 10 mbar). 1.78 g of crude base were obtained. 1.00 g of the hydrochloride of [2-(dimethylaminophenylmethyl)-cyclohexyl]4-methoxybenzoate (58% of theoretical) with a melting point above 230° C. was obtained from the crude base in accordance with Example 1 (4th stage) using chlorotrimethylsilane/water in 2-butanone.

1. additionwas then added dropwise
2. customthe organic phase was separated
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated on a rotary evaporator (500 to 10 mbar)
6. custom1.78 g of crude base were obtained