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    • 6. 发明申请
    • O-SUBSTITUTED (2R,3R)-3-(3-HYDROXYPHENYL)-2-METHYL-4-PENTENOIC ACIDS AND A METHOD OF OBTAINING THE SAME
    • O-取代的(2R,3R)-3-(3-羟基苯基)-2-甲基-4-对硝基苯酸及其获得方法
    • WO2012089181A1
    • 2012-07-05
    • PCT/CZ2011/000128
    • 2011-12-30
    • ZENTIVA, K.S.VLASAKOVA, RuzenaHAJICEK, JosefZEZULA, Josef
    • VLASAKOVA, RuzenaHAJICEK, JosefZEZULA, Josef
    • C07C213/02C07C231/02C07C51/09C07C51/377C07C51/60C07C59/52C07C59/64C07C213/08
    • C07C213/08C07B2200/07C07C51/09C07C51/377C07C51/412C07C51/43C07C51/60C07C59/64C07C213/02C07C231/02C07C217/62C07C215/54C07C235/34
    • The compounds of general formula II are new and represent important intermediates in the synthesis of tapentadol. In the synthesis of tapentadol of formula I and its pharmaceutically acceptable salts, O-protected (2R,3R)-acids of general formula II, in step A, are reacted in an inert organic solvent with an activating agent, optionally in presence of a catalyst or a base; in step B, the obtained compounds of general formula V, wherein R has the above mentioned meaning and X stands for chlorine or alkoxycarbonyloxyl group O-CO-OR 1 or pivaloyloxyl O-CO-t-Bu group, wherein R 1 is methyl or ethyl, are reacted with dimethylamine or its salts optionally in presence of a base; in step C, the obtained N, N-dimethylamides of general formula VI, wherein R has the above mentioned meaning, are reduced by means of hydride agents in a suitable solvent; in step D, the produced alkeneamines of general formula VII, wherein R has the above mentioned meaning, are hydrogenated on a metal catalysts in a suitable solvent; and, finally, in step E, the produced alkaneamines of general formula VIII, wherein R has the above mentioned meaning, are O-dealkylated by means of dealkylating agents, and, if required, the obtained tapentadol is converted by the action of a pharmaceutically acceptable acid to respective salts, e.g. hydrochloride.
    • 通式II的化合物是新的,并且代表了他喷他多合成中的重要中间体。 在式I的他喷他多和其药学上可接受的盐的合成中,步骤A中通式II的O-保护的(2R,3R) - 酸在惰性有机溶剂中与活化剂反应,任选在 催化剂或碱; 在步骤B中,得到的通式V的化合物,其中R具有上述含义,X代表氯或烷氧基羰基氧基O-CO-OR1或新戊酰氧基O-CO-t-Bu基团,其中R1是甲基或乙基, 与二甲胺或其盐任选在碱存在下反应; 在步骤C中,所得到的通式Ⅵ的N,N-二甲基酰胺,其中R具有上述含义,在合适的溶剂中用氢化剂还原; 在步骤D中,所制备的具有上述含义的通式VII的烯烃在合适的溶剂中在金属催化剂上氢化; 最后,在步骤E中,所制备的通式VIII的烷烃,其中R具有上述含义,通过脱烷基化剂进行O-脱烷基化,如果需要,所得到的他喷他多通过药学上的作用转化 各种盐可接受的酸,例如 盐酸盐。