Preparation of (R -2-alkyl-3-phenylpropionic acids
    3.
    发明授权
    Preparation of (R -2-alkyl-3-phenylpropionic acids 失效
    (R -2-烷基-3-苯基丙酸的制备)

    公开(公告)号:US06683206B2

    公开(公告)日:2004-01-27

    申请号:US10312855

    申请日:2003-01-02

    IPC分类号: C07C6364

    CPC分类号: C07C59/66 C07C51/36

    摘要: Compounds of formula (I), wherein R1 and R2 are, independently of one another, H, C1-C6alkyl, C1-C6halogenalkyl, C1-C6alkoxy, C1-C6alkoxy-C1-C6alkyl, or C1-C6alkoxy-C1l-C6alkyloxy, and R3 is C1-C6alkyl, are obtainable in high yields by stereoselective addition of R3-substituted propionic acid esters to R1- and R2-substituted benzaldehydes of formula R—CHO to form corresponding 3-R-3-hydroxy-2-R3-propionic acid esters, conversion of the OH group to a leavaing group, subsequent regioselective elimination to form 3-R-2-R3-propenic acid esters, and their hydrolysis to form corresponding propenic carboxylic acids and their enantioselective hydrogenation, wherein R is (a).

    摘要翻译: 式(I)化合物,其中R 1和R 2彼此独立地为H,C 1 -C 6烷基,C 1 -C 6卤代烷基,C 1 -C 6烷氧基,C 1 -C 6烷氧基-C 1 -C 6烷基或C 1 -C 6烷氧基-C 1 -C 6烷氧基, R 3是C 1 -C 6烷基,可以通过立体选择性地将R 3取代的丙酸酯加成到式R-CHO的R 1和R 2取代的苯甲醛以高产率获得,形成相应的3-R-3-羟基-2-R3-丙酸 酸酯,OH基转化为脱氯基团,随后进行区域选择性消除以形成3-R-2-R3-丙烯酸酯,并且它们的水解形成相应的丙烯羧酸及其对映选择性氢化,其中R为(a) 。

    Process for the preparation of (R)-2-alkyl-3-phenyl-1-propanols
    4.
    发明授权
    Process for the preparation of (R)-2-alkyl-3-phenyl-1-propanols 失效
    制备(R)-2-烷基-3-苯基-1-丙醇的方法

    公开(公告)号:US06881868B2

    公开(公告)日:2005-04-19

    申请号:US10312992

    申请日:2001-06-26

    摘要: Compounds of formula (I), wherein R1 and R2 are, independently of one another, H,C1-C6alkyl, C1-C6halogenalkyl, C1-C6alkoxyl, C1-C6alkoxy-C1-C6alkyl, or C1-C6alkoxy-C1-C6alkyloxy, and R3 is C1-C6alkyl, are obtainable in high yiedls by stereoselective addition of R3-substituted propionic acid esters to R1- and R2-substituted benzaldehydes of formula R—CHO to form corresponding 3-R-3-hydroxy-2-R3-propionic acid esters, conversion of the OH group to a leaving group, subsequent regioselective elimination to form 3-R-2-R3-propenic acid esters, and reduction to corresponding 3-R-2-R3-allyl alcohols and their enantioselective hydrogenation, wherein R is (a).

    摘要翻译: 式(I)化合物,其中R 1和R 2各自独立地为H,C 1 -C 3烷基, C 1 -C 6烷基,C 1 -C 6卤代烷基,C 1 -C 6烷氧基,C C 1 -C 6烷氧基-C 1 -C 6烷基或C 1 -C 12 -C 6 -C 6烷氧基-C 1 -C 6烷氧基,R 3是C 1 可以通过立体选择性加成R 3 - 取代的丙酸酯与R 1 - (C 1 -C 6)烷基取代, 和R 2 CHO的R 2取代的苯甲醛形成相应的3-R-3-羟基-2-R 3 - 丙酸酯,OH基团的转化 到离去基团,随后进行区域选择性消除以形成3-R-2-R 3 - 丙酸酯,并还原成相应的3-R-2-R 3 - 烯丙醇及其对映选择性氢化,其中R为(a)。

    Process for preparing organic compounds
    8.
    发明授权
    Process for preparing organic compounds 失效
    制备有机化合物的方法

    公开(公告)号:US07723550B2

    公开(公告)日:2010-05-25

    申请号:US12224418

    申请日:2007-11-08

    摘要: Process for preparing a compound of the formula (I) in which R1 and R2 are each independently H, C1-C8-alkyl, halogen, polyhalo-C1-C8-alkoxy, polyhalo-C1-C8-alkyl, C1-C8-alkoxy, C1-C8-alkoxy-C1-C8-alkyl, or C1-C8-alkoxy-C1-C8-alkoxy, where R1 and R2 are not both H, and R3 is C1-C8-alkyl, which is characterized in that a) a compound of the formula (II) in which R1 and R2 are each as defined above and X is Br, I, triflate, toyslate or mesylate is reacted with prop-2-yn-1-ol to give the compound of the formula (III), b) the compound of the formula (III) is reacted with an alkyl-metal compound in which “alkyl” is as defined above for R3 to give a compound of the formula (I).

    摘要翻译: 制备式(I)化合物的方法,其中R 1和R 2各自独立地为H,C 1 -C 8 - 烷基,卤素,多卤代-C 1 -C 8 - 烷氧基,多卤代-C 1 -C 8 - 烷基,C 1 -C 8 - 烷氧基 ,C 1 -C 8 - 烷氧基-C 1 -C 8 - 烷基或C 1 -C 8 - 烷氧基-C 1 -C 8 - 烷氧基,其中R 1和R 2不都是H,且R 3是C 1 -C 8 - 烷基,其特征在于 )其中R 1和R 2各自如上定义并且X是Br,I,三氟甲磺酸酯,玩具或甲磺酸酯的式(II)化合物与丙-2-炔-1-醇反应,得到式 (III)中,b)式(III)化合物与烷基金属化合物反应,其中“烷基”如上述R3所定义,得到式(I)化合物。