Compoundsoftheformula
and pharmaceutically acceptable non-toxic acid addition salts thereof, in which L and D define the chirality;
R1 is hydrogen or C1-C3 primary alkyl;
R, is C1-C4 primary or secondary alkyl, allyl, cyclopropylmethyl, C1-C2 hydroxyalkyl, or -(CH2) -U-CH in which U is -S- or 2 3
and m is 1 or2; R3 is hydrogen, C1-C4 primary or secondary alkyl, cyclopropylmethyl, or allyl;
X is hydrogen, halo, hydroxy, C1-C3 alkoxy, nitro, C1-C3 alkyl, or trifluoromethyl; and
Z i 5
in which R, is hydrogen or C1-C3 alkyl and R, is C1-C3 alkyl; are useful analgesic agents. These compounds of formula I are prepared by deblocking the corresponding blocked compound of formula I by conventional methods.
式化合物
及其药学上可接受的无毒酸加成盐,其中 L 和 D 定义了手性;
R1 是氢或 C1-C3 伯烷基;
R,是 C1-C4 伯烷基或仲烷基、烯丙基、
环丙基甲基、C1-C2 羟烷基或-(
CH2) -U-CH,其中 U 是 -S- 或 2 3
R3 是氢、C1-C4 一级或二级烷基、
环丙基甲基或烯丙基;
X 是氢、卤素、羟基、C1-C3 烷氧基、硝基、C1-C3 烷基或三
氟甲基;以及
Z i 5
中,R 是氢或 C1-C3 烷基,R 是 C1-C3 烷基;这些都是有用的镇痛剂。这些式 I 化合物是通过常规方法对相应的式 I 封端化合物进行解封而制备的。