申请人:Alkaloida Vegyeszeti Gyar
公开号:US04647694A1
公开(公告)日:1987-03-03
The invention relates to a process for the preparation of DL-.beta.-aryl-amino acids of the general Formula ##STR1## wherein R, R.sub.1 and R.sub.2 stand for hydrogen, halogen, C.sub.1-6 alkyl, C.sub.1-6 alkoxy, nitro or C.sub.1-4 dialkylamino; whereby in the case of monosubstituted derivatives R and R.sub.1 are hydrogen and R.sub.2 has the same meaning as stated above and can be attached to position 2, 3 or 4 related to the methylene group; in the case of disubstituted derivatives R is hydrogen and R.sub.1 and R.sub.2 have the same meaning as stated above and are attached to positions 2,3; 2,4; 2,5; 2,6; 3,4 or 3,5 related to the methylene group; in the case of trisubstituted derivatives R, R.sub.1 and R.sub.2 have the same meaning as stated above and are attached to positions 2,3,4; 2,3,5; 2,3,6; 3,4,5 or 3,4,6 related to the methylene group.
该发明涉及一种制备DL-.beta.-芳基氨基酸的过程,其通式如下所示:其中R、R.sub.1和R.sub.2代表氢、卤素、C.sub.1-6烷基、C.sub.1-6烷氧基、硝基或C.sub.1-4二烷基氨基;对于单取代衍生物,若R和R.sub.1为氢,则R.sub.2具有上述相同含义,并可附着于与亚甲基基团相关的2、3或4位置;对于双取代衍生物,R为氢,R.sub.1和R.sub.2具有上述相同含义,并附着于2、3;2、4;2、5;2、6;3、4或3、5位置;对于三取代衍生物,R、R.sub.1和R.sub.2具有上述相同含义,并附着于2、3、4;2、3、5;2、3、6;3、4、5或3、4、6位置。