申请人:Canon Kabushiki Kaisha
公开号:US05114613A1
公开(公告)日:1992-05-19
An optically active lactic acid derivative represented by the following formula (I): ##STR1## wherein R represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; l is 0 or 1; m is 1 or 2; A represents a group selected from the following groups (a) and (b): (a) hydroxyl group, halogen, benzyloxy group, phenoxy group, toluenesulfonic acid group, acetyloxy group, trifluoroacetyloxy group; ##STR2## (wherein R' is an alkyl group or alkoxy group having 4 to 18 carbon atoms, n is 0 or 1, ##STR3## with proviso that when A is selected from the groups in the above group (a), l is 1 and m is 1 or 2; and when A is selected from the groups in the above group (b), m=n=1 when l is 0, or m and n are 0, 1 or 2 and m+n is 1 or 2 when l is 1, and ##STR4##
下面是一个光学活性的乳酸衍生物,其化学式为(I):##STR1## 其中R代表具有1到18个碳原子的线性、支链或环状饱和或不饱和的烃基;C*代表一个不对称的碳原子;l为0或1;m为1或2;A代表从以下组(a)和(b)中选择的一个基团:(a)羟基、卤素、苄氧基、苯氧基、甲苯磺酸基、乙酰氧基、三氟乙酰氧基;##STR2##(其中R'是具有4到18个碳原子的烷基或烷氧基,n为0或1,##STR3## 前提是当A从上述组(a)中选择时,l为1且m为1或2;当A从上述组(b)中选择时,当l为0时,m=n=1;或当l为1时,m和n为0、1或2且m+n为1或2,且##STR4##