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    • 142. 发明公开
    • NOVEL PROCESSES
    • 新工艺
    • EP1242378A1
    • 2002-09-25
    • EP00986715.1
    • 2000-12-22
    • SmithKline Beecham CorporationSmithKline Beecham plc
    • BROOK, Christopher, S.CURZONS, Alan, D.GRADY, Carolyn, W.O'CONNOR, Anthony, J.
    • C07D211/22C07D211/88A61K31/445
    • C07D211/22A61K31/445
    • A process for the manufacture of the (-) trans piperidine carbinol (1) by a process comprising contacting a racemic mixture of the piperidine carbinol in solution with (-)-ditoluoyltartaric acid, crystallising the (-)-ditoluoyltartaric acid salt of the piperidine carbinol, isolating the crystalline salt and neutralising the crystalline salt to regenerate the (-) trans isomer of the piperidine carbinol and the (-)-ditoluoyltartaric acid, which is characterised by one or more of the following steps: (1) combining solutions of the racemic piperidine carbinol and (-)-ditoluoyltartaric acid in acetone so that the combined solution contains 2-3 % wt/wt of water, (2) consolidating the chiral salt crystallisation at from 30 to 40 °C, (3) cooling the crystallisation mixture to from 3 to 7 °C before isolating the chiral salt, (4) regenarating the (-) trans piperidine carbinol at a pH of from 10.5 to 11.5, (5) forming a concentrated solution of the (-) trans piperidine carbinol in toluene, contacting the solution with heptane at 60-65 °C, and cooling stepwise to crystallise the (-) trans piperidine carbinol. Alternatively, a solution of the racemic piperidine carbinol in toluene, suitably from a previous stage in the manufacture of paroxetine, is combined with a solution of (-)-ditoluoyltartaric acid in acetone. The resultant (-) trans piperidine carbinol of structure (1) may be coupled with sesamol, then deprotected, to give paroxetine (2), with optional formation of a pharmaceutically acceptable salt of paroxetine.
    • 149. 发明公开
    • METHOD OF PREPARING OPTICALLY PURE PRECURSORS OF PAROXETINE.
    • VERFAHREN ZUR HERSTELLUNG VON OPTISCH REINEN PRECURSORN VON PAROXETIN。
    • EP0654025A4
    • 1995-10-11
    • EP93918661
    • 1993-08-05
    • SEPRACOR INC
    • ZEPP CHARLES MGAO YUNHEEFNER DONALD L
    • C07D211/22C07D211/88C12P41/00
    • C07D211/88C07D211/22C12P41/005
    • A biocatalytic method of preparing optically pure precursors of paroxetine and a method of preparing paroxetine therefrom are disclosed. A racemic trans ester precursor compound of paroxetine is first prepared. The racemic trans ester precursor compound comprises a mixture of (3S, 4R) and (3R, 4S) enantiomers. The (3R, 4S) enantiomer is hydrolyzed biocatalytically to the corresponding (3R, 4S)-trans carboxylic acid or alternatively, the (3S, 4R) enantiomer is biocatalytically hydrolyzed to the (3S, 4R)-trans carboxylic acid in a reaction catalyzed by an isolated enzyme or a microorganism. In the first instance, the unhydrolyzed (3S, 4R) enantiomer is separated from the (3R, 4S)-trans carboxylic acid, whereas in the second instance the (3S, 4R)-trans carboxylic acid is separated from the unhydrolyzed (3R, 4S) enantiomer. The (3S, 4R) enantiomer obtained following the selective hydrolysis is reduced to form a (-)-trans-(3S, 4R) primary alcohol precursor of paroxetine. Paroxetine is then formed from the (-)-trans-(3S, 4R) primary alcohol precursor.
    • 公开了制备光学纯的帕罗西汀前体的生物催化方法和由其制备帕罗西汀的方法。 首先制备帕罗西汀的外消旋转酯前体化合物。 外消旋的转酯前体化合物包含(3S,4R)和(3R,4S)对映体的混合物。 (3R,4S)对映异构体被生物催化水解为相应的(3R,4S) - 反式羧酸,或者在催化的反应中将(3S,4R)对映异构体生物催化水解成(3S,4R) - 反式羧酸 通过分离的酶或微生物。 首先,将未水解的(3S,4R)对映体从(3R,4S) - 反式羧酸中分离出来,而在第二种情况下将(3S,4R) - 反式羧酸从未水解的(3R, 4S)对映体。 选择性水解后得到的(3S,4R)对映体被还原形成帕罗西汀的( - ) - 反式 - (3S,4R)伯醇前体。 然后由( - ) - 反式 - (3S,4R)伯醇前体形成帕罗西汀。