Process for the synthesis of optically active aminoacids
    25.
    发明公开
    Process for the synthesis of optically active aminoacids 失效
    合成光活性氨基酸的方法

    公开(公告)号:EP0351382A3

    公开(公告)日:1991-10-09

    申请号:EP89830317.7

    申请日:1989-07-07

    Abstract: New process for the synthesis of optically active aminoacids of formula
    wherein R and R₁, equal or different,represent a hydrogen atom or an alkyl radical, straight or branched, containing from 1 to 6 carbon atoms, by reacting compounds of formula
    wherein R and R₁ have the above seen meanings, R₂ represent a nitrile group or a COR₄ group wherein R₄ represents hydroxy or halogen or alkoxy, straight or branched,containing from 1 to 6 carbon atoms,or a OCOR₅ wherein R₅ represents an alkyl or an alkoxy group, straight or branched, containing from 1 to 6 carbon atoms and R₃ represents hydrogen, an alkyl or an alkoxy radical, straight or branched, containing from 1 to 6 carbon atoms or an aryl or aralkyl radical, with an optically active alcohol of formula R₆-OH      (III) d or l
    wherein R₆ represents an alkyl or cycloalkyl group, substituted or unsubstituted, containing from 3 to 12 carbon atoms, to obtain a pair of diastereoisomer esters of formula
    which is resolved in basic medium into the single diastereoisomer esters of formula
    from which the desired optically active aminoacid of formula (I) is obtained by treatment in acid medium.

Patent Agency Ranking