Stereopreferential synthesis of
3-(1-phenylprop-2-yl)-5-phenyloxazolidinones
    3.
    发明授权
    Stereopreferential synthesis of 3-(1-phenylprop-2-yl)-5-phenyloxazolidinones 失效
    3-(1-苯基丙-2-基)-5-苯基恶唑烷酮的立体异构合成

    公开(公告)号:US5468865A

    公开(公告)日:1995-11-21

    申请号:US237190

    申请日:1994-05-03

    摘要: The (R,R)-diastereoisomer of oxazolidin-2-ones, which are chemical intermediates for the preparation therapeutic agents useful in the treatment of diabetes and hyperglycemia, are prepared substantially free of isomeric forms through reduction of an acid addition salt of an (R)-N-protected-N-phenylcarboxymethyl-1-phenylprop-2-ylamine to form a secondary alcohol of predominantly the (R,R) chiral form in preference to others, removal of the protecting group to form a secondary amine, and allowing the secondary amine to react with a source of carbonyl groups. A typical embodiment involves the preparation of (R,R)-3-[1-(3,4-dimethoxyphenyl)prop-2-yl]-5-(3-chlorophenyl)oxazolidin-2-one in which both the chemical purity and optical purity are in excess of 99%.

    摘要翻译: 作为可用于治疗糖尿病和高血糖症的制剂治疗剂的化学中间体的恶唑烷-2-酮的(R,R) - 非对映异构体通过还原 R)-N-保护的N-苯基羧基甲基-1-苯基丙-2-基胺以形成主要为(R,R)手性形式的仲醇,优选除去其它保护基以形成仲胺,以及 使仲胺与羰基源反应。 典型的实施方案涉及(R,R)-3- [1-(3,4-二甲氧基苯基)丙-2-基] -5-(3-氯苯基)恶唑烷-2-酮的制备,其中化学纯度 光学纯度超过99%。

    Herbicidally active 3-isoxazolyl-2-imidazolidinone derivatives
    6.
    发明授权
    Herbicidally active 3-isoxazolyl-2-imidazolidinone derivatives 失效
    除草活性3-异恶唑基-2-咪唑烷酮衍生物

    公开(公告)号:US4689071A

    公开(公告)日:1987-08-25

    申请号:US859271

    申请日:1986-05-02

    IPC分类号: A01N43/80 C07D413/04

    CPC分类号: C07D413/04 A01N43/80

    摘要: This invention relates to certain 3-isoxazolyl-2-imidazolidinone derivatives, namely 3-[5- or 3-substituted -3- or -5-isoxazolyl]-1-,4- or 5-substituted-2-imidazolidinones and the use thereof for preemergence or post-emergence control of noxious plants, i.e., weeds.

    摘要翻译: 本发明涉及某些3-异恶唑-2-咪唑啉酮衍生物,即3- [5-或3-取代的-3-或-5-异恶唑基] -1-,4-或5-取代-2-咪唑啉酮,其用途 用于对有害植物,即杂草进行芽前或出苗后控制。