5-Trihalogenomethyl-4,5-dihyro-oxazole-4-carboxylic acid esters
    1.
    发明授权
    5-Trihalogenomethyl-4,5-dihyro-oxazole-4-carboxylic acid esters 失效
    5-三卤甲基-4,5-二羟基 - 恶唑-4-羧酸酯

    公开(公告)号:US4061650A

    公开(公告)日:1977-12-06

    申请号:US635361

    申请日:1975-11-26

    CPC分类号: C07D263/16

    摘要: Alkyl (or aralkyl) .alpha.-isocyanoacetate is condensed with a trihalogenoacetic aldehyde or its hydrate in the presence of an amine to give trans-4-alkoxycarbonyl(or aralkyloxycarbonyl)-5-trihalogenomethyl-2-oxazoline. The oxazoline compound is hydrolyzed under acidic conditions to give threo-.gamma.,.gamma.,.gamma.-trihalogenothreonine, which is then subjected to catalytic or electrolytic reduction. The above-mentioned reactions can be carried out stereoselectively and threo-threonine is thereby obtained without by-products such as allo-threonine.

    摘要翻译: 烷基(或芳烷基)α-异氰酸乙酸酯与三卤代乙醛或其水合物在胺的存在下缩合,得到反式-4-烷氧基羰基(或芳烷氧基羰基)-5-三卤代甲基-2-恶唑啉。 恶唑啉化合物在酸性条件下水解,得到苏氨酸,γ,γ-三卤代氨基酸,然后进行催化或电解还原。 上述反应可以立体选择性地进行,由此得到苏氨酸,而没有副产物如异苏氨酸。

    Nicotinoyl carnitine derivatives
    2.
    发明授权
    Nicotinoyl carnitine derivatives 失效
    烟酰基肉碱衍生物

    公开(公告)号:US4032641A

    公开(公告)日:1977-06-28

    申请号:US694363

    申请日:1976-06-09

    CPC分类号: C07D213/80

    摘要: A nicotinoyl carnitine compound of the formula: ##STR1## wherein R is lower alkoxy, benzyloxy or amino and X is an anionic residue of a pharmaceutically acceptable acid, is prepared by reacting a carnitine derivative of the formula: ##STR2## wherein R is the same as defined above, with nicotinic acid or a functional derivative thereof. The derivative [I] and the pharmaceutically acceptable acid addition salts of said compound are useful as hypolipidemic agents.

    摘要翻译: 通过使下式的肉碱衍生物:其中R是低级烷氧基,苄氧基或氨基,X是药学上可接受的酸的阴离子残基,通过下式得到的烟酰基肉碱化合物:其中R是低级烷氧基, II]其中R与上述定义相同,与烟酸或其功能衍生物。 所述化合物的衍生物[I]和药学上可接受的酸加成盐可用作降血脂药。