Methods for preparing hydroxy compounds and intermediates
    3.
    发明公开
    Methods for preparing hydroxy compounds and intermediates 失效
    制备羟基化合物和中间体的方法

    公开(公告)号:EP0239194A3

    公开(公告)日:1987-11-11

    申请号:EP87300693

    申请日:1987-01-27

    申请人: SYN-TEK AB

    摘要: A method for preparing an unprotected hydroxy compound from a protected hydroxy compound of the general formula I
    in which R, is the non-hydroxy moiety of the protected hydroxy compound; R 2 , R 3 , R 4 and R 5 which may be the same or different are hydrogen, C I - 4 alkyl or aryl;
    and R 6 , R 7 and R 8 which may be same or different are C 1-4 alkyl, optionally substituted phenyl or a carrier in which the compound of formula 1 is reacted with a Lewis acid followed by reaction with water forming a hydroxy compound of the general formula II
    A method for preparing a compound of the general formula III
    in which R 1 is the non-hydroxy moiety of a hydroxy compound; and A is an acyl group; A compound of the general formula IV
    in which R 1 is the non-hydroxy moiety of a hydroxy compound; and X is a residue of a Lewis acid; A method according to claim 4 in which R 1 is the non-hydroxy moiety of a hydroxy-containing amino acid forming part of a peptide, and one of R 6 , R 7 and R 8 is a carrier; and A compound of the general formula la
    wherein R 1 is a carbohydrate moiety containing two or more sugar units or a derivative thereof.