One pot synthesis of 2-oxazolidinone derivatives
    7.
    发明授权
    One pot synthesis of 2-oxazolidinone derivatives 有权
    一锅合成2-恶唑烷酮衍生物

    公开(公告)号:US6160123A

    公开(公告)日:2000-12-12

    申请号:US496409

    申请日:2000-02-02

    申请人: Rajnikant Patel

    发明人: Rajnikant Patel

    摘要: The present invention provides an improved process for preparing (S)-4-{[3-[2-(dimethylamino)ethyl]-1H-indol-5-yl]methyl}-2-oxazolidinone which comprises: a) forming a carbamate of formula (III), from methyl 4-nitro-(L)-phenylalaninate hydrochloride; b) reducing the compound of formula (III) to give the compound of formula (IV); c) reducing the methyl ester grouping in the compound of formula (IV) to give the compound of formula (V); d) ring closure of the compound of formula (V) to give the compound of formula (VI); e) diazonium salt formation from the compound of formula (VI) followed by reduction to give the compound of formula (VII); f) Fischer reaction of the compound of formula (VIl) to give (S)-4-{[3-[2-(dimethylamino)ethyl]-1H-indol-5-yl]methyl}-2-oxazolidinone.

    摘要翻译: 本发明提供了制备(S)-4 - {[3- [2-(二甲基氨基)乙基] -1H-吲哚-5-基]甲基} -2-恶唑烷酮的改进方法,其包括:a)形成氨基甲酸酯 由式(III)得自4-硝基 - (L) - 苯丙氨酸甲酯盐酸盐; b)还原式(III)化合物以得到式(Ⅳ)化合物; c)还原式(IV)化合物中的甲酯基团,得到式(Ⅴ)化合物; d)式(Ⅴ)化合物闭环,得到式(Ⅵ)化合物; e)由式(VI)化合物形成重氮盐,然后还原,得到式(Ⅶ)化合物; f)式(VIl)化合物与(S)-4 - {[3- [2-(二甲基氨基)乙基] -1H-吲哚-5-基]甲基} -2-恶唑烷酮的费休反应。